<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE eagle SYSTEM "eagle.dtd">
<eagle version="6.6.0">
<drawing>
<board>
<plain>
<text>10 BIT D-A CONVERTER</text>
<text>A607B</text>
</plain>
<libraries>
<library name="74xx-us">
<packages>
<package name="DIL14">
<description>&lt;b&gt;Dual In Line Package&lt;/b&gt;</description>
</package>
</packages>
</library>
<library name="dec-con">
<packages>
<package name="DOUBLE">
<description>Double-Height DEC board</description>
</package>
<package name="EDGE-CON4">
<description>Double-Height DEC edge connector</description>
</package>
<package name="0818/25">
<description>One inch resistor package</description>
</package>
<package name="0414/20">
<description>&lt;b&gt;RESISTOR&lt;/b&gt;&lt;p&gt;
type 0414, grid 15 mm</description>
</package>
</packages>
</library>
<library name="diode">
<packages>
<package name="DO35-10">
<description>&lt;B&gt;DIODE&lt;/B&gt;&lt;p&gt;
diameter 2 mm, horizontal, grid 10.16 mm</description>
</package>
<package name="DO13M">
<description>&lt;B&gt;DIODE&lt;/B&gt;&lt;p&gt;
diameter 6.35 mm metall, horizontal, grid 20.32 mm</description>
</package>
<package name="DO35Z10">
<description>&lt;B&gt;DIODE&lt;/B&gt;&lt;p&gt;
diameter 2 mm, horizontal, grid 10.16mm</description>
</package>
</packages>
</library>
<library name="transistor">
<packages>
<package name="TO5">
<description>&lt;b&gt;TO 5&lt;/b&gt;</description>
</package>
</packages>
</library>
<library name="rcl">
<packages>
<package name="0207/10">
<description>&lt;b&gt;RESISTOR&lt;/b&gt;&lt;p&gt;
type 0207, grid 10 mm</description>
</package>
<package name="C075-032X103">
<description>&lt;b&gt;CAPACITOR&lt;/b&gt;&lt;p&gt;
grid 7.5 mm, outline 3.2 x 10.3 mm</description>
</package>
<package name="0207/15">
<description>&lt;b&gt;RESISTOR&lt;/b&gt;&lt;p&gt;
type 0207, grid 15mm</description>
</package>
<package name="C050-025X075">
<description>&lt;b&gt;CAPACITOR&lt;/b&gt;&lt;p&gt;
grid 5 mm, outline 2.5 x 7.5 mm</description>
</package>
<package name="E25-9">
<description>&lt;b&gt;ELECTROLYTIC CAPACITOR&lt;/b&gt;&lt;p&gt;
grid 25.4 mm, diameter 9 mm</description>
</package>
</packages>
</library>
<library name="linear">
<packages>
<package name="TO78">
<description>&lt;b&gt;Metal Can Package&lt;/b&gt;</description>
</package>
</packages>
</library>
</libraries>
<attributes>
</attributes>
<variantdefs>
</variantdefs>
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<element name="E1" library="74xx-us" package="DIL14" value="7474N"/>
<element name="E2" library="74xx-us" package="DIL14" value="7474N"/>
<element name="E3" library="74xx-us" package="DIL14" value="7474N"/>
<element name="E4" library="74xx-us" package="DIL14" value="7474N"/>
<element name="E5" library="74xx-us" package="DIL14" value="7474N"/>
<element name="U$1" library="dec-con" package="DOUBLE" value="OUTLINE-DOUBLE"/>
<element name="U$2" library="dec-con" package="EDGE-CON4" value=""/>
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<element name="D2" library="diode" package="DO35-10" value="1N4154"/>
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<element name="Q7" library="transistor" package="TO5" value="2N3906"/>
<element name="Q8" library="transistor" package="TO5" value="2N3906"/>
<element name="Q9" library="transistor" package="TO5" value="2N3906"/>
<element name="Q10" library="transistor" package="TO5" value="2N3906"/>
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<element name="C3" library="rcl" package="C075-032X103" value="47pF"/>
<element name="C4" library="rcl" package="C075-032X103" value="47pF"/>
<element name="C5" library="rcl" package="C075-032X103" value="47pF"/>
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<element name="R46" library="rcl" package="0207/10" value="2.7K"/>
<element name="R48" library="rcl" package="0207/10" value="3.9K"/>
<element name="R50" library="rcl" package="0207/15" value="2000"/>
<element name="R49" library="rcl" package="0207/15" value="4000"/>
<element name="R47" library="rcl" package="0207/15" value="8000"/>
<element name="R33" library="dec-con" package="0414/20" value="1024000"/>
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<element name="D30" library="diode" package="DO35-10" value="1N4154"/>
<element name="Q23" library="transistor" package="TO5" value="BC557"/>
<element name="Q22" library="transistor" package="TO5" value="2N4235"/>
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<element name="R55" library="dec-con" package="0818/25" value="68 1W"/>
<element name="R1" library="dec-con" package="0818/25" value="0"/>
</elements>
<signals>
<signal name="GND">
<contactref element="E1" pad="7"/>
<contactref element="E2" pad="7"/>
<contactref element="E3" pad="7"/>
<contactref element="E4" pad="7"/>
<contactref element="E5" pad="7"/>
<contactref element="U$2" pad="AC2"/>
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<contactref element="C15" pad="-"/>
<contactref element="C13" pad="+"/>
<contactref element="C12" pad="+"/>
<contactref element="D32" pad="C"/>
</signal>
<signal name="VCC">
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<contactref element="E3" pad="14"/>
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<contactref element="R64" pad="2"/>
<contactref element="R53" pad="2"/>
<contactref element="Q21" pad="6"/>
<contactref element="C15" pad="+"/>
</signal>
<signal name="N$1">
<contactref element="E1" pad="2"/>
<contactref element="U$2" pad="AE2"/>
</signal>
<signal name="N$2">
<contactref element="E1" pad="12"/>
<contactref element="U$2" pad="AF2"/>
</signal>
<signal name="N$3">
<contactref element="E2" pad="2"/>
<contactref element="U$2" pad="AM2"/>
</signal>
<signal name="N$4">
<contactref element="E2" pad="12"/>
<contactref element="U$2" pad="AN2"/>
</signal>
<signal name="N$5">
<contactref element="E3" pad="2"/>
<contactref element="U$2" pad="AS2"/>
</signal>
<signal name="N$6">
<contactref element="E3" pad="12"/>
<contactref element="U$2" pad="AT2"/>
</signal>
<signal name="N$7">
<contactref element="E4" pad="2"/>
<contactref element="U$2" pad="BD2"/>
</signal>
<signal name="N$8">
<contactref element="E4" pad="12"/>
<contactref element="U$2" pad="BE2"/>
</signal>
<signal name="N$9">
<contactref element="E5" pad="2"/>
<contactref element="U$2" pad="BH2"/>
</signal>
<signal name="N$10">
<contactref element="E5" pad="12"/>
<contactref element="U$2" pad="BJ2"/>
</signal>
<signal name="!CLEAR">
<contactref element="E1" pad="13"/>
<contactref element="E1" pad="1"/>
<contactref element="E2" pad="1"/>
<contactref element="E2" pad="13"/>
<contactref element="E5" pad="13"/>
<contactref element="E5" pad="1"/>
<contactref element="E4" pad="13"/>
<contactref element="E4" pad="1"/>
<contactref element="E3" pad="13"/>
<contactref element="E3" pad="1"/>
<contactref element="U$2" pad="AL2"/>
</signal>
<signal name="CLOCK">
<contactref element="E1" pad="3"/>
<contactref element="E1" pad="11"/>
<contactref element="E2" pad="3"/>
<contactref element="E2" pad="11"/>
<contactref element="E3" pad="3"/>
<contactref element="E5" pad="11"/>
<contactref element="E3" pad="11"/>
<contactref element="E4" pad="3"/>
<contactref element="E4" pad="11"/>
<contactref element="E5" pad="3"/>
<contactref element="U$2" pad="AD2"/>
</signal>
<signal name="N$11">
<contactref element="E5" pad="8"/>
<contactref element="D1" pad="A"/>
</signal>
<signal name="N$12">
<contactref element="E5" pad="6"/>
<contactref element="D3" pad="A"/>
</signal>
<signal name="N$13">
<contactref element="E4" pad="8"/>
<contactref element="D5" pad="A"/>
</signal>
<signal name="N$14">
<contactref element="E4" pad="6"/>
<contactref element="D7" pad="A"/>
</signal>
<signal name="N$15">
<contactref element="E3" pad="8"/>
<contactref element="D9" pad="A"/>
</signal>
<signal name="N$16">
<contactref element="E3" pad="6"/>
<contactref element="D11" pad="A"/>
</signal>
<signal name="N$17">
<contactref element="E2" pad="8"/>
<contactref element="D13" pad="A"/>
</signal>
<signal name="N$18">
<contactref element="E2" pad="6"/>
<contactref element="D15" pad="A"/>
</signal>
<signal name="N$19">
<contactref element="E1" pad="8"/>
<contactref element="D17" pad="A"/>
</signal>
<signal name="N$20">
<contactref element="E1" pad="6"/>
<contactref element="D19" pad="A"/>
</signal>
<signal name="N$21">
<contactref element="D19" pad="C"/>
<contactref element="D20" pad="A"/>
</signal>
<signal name="N$22">
<contactref element="D17" pad="C"/>
<contactref element="D18" pad="A"/>
</signal>
<signal name="N$23">
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</signal>
<signal name="N$24">
<contactref element="D13" pad="C"/>
<contactref element="D14" pad="A"/>
</signal>
<signal name="N$25">
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<contactref element="D12" pad="A"/>
</signal>
<signal name="N$26">
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</signal>
<signal name="N$27">
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</signal>
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</signal>
<signal name="N$31">
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</signal>
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</signal>
<signal name="N$33">
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<contactref element="R9" pad="2"/>
</signal>
<signal name="N$34">
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</signal>
<signal name="N$35">
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<contactref element="Q6" pad="2"/>
<contactref element="R7" pad="2"/>
</signal>
<signal name="N$36">
<contactref element="Q5" pad="2"/>
<contactref element="D10" pad="C"/>
<contactref element="R6" pad="2"/>
</signal>
<signal name="N$37">
<contactref element="Q4" pad="2"/>
<contactref element="D8" pad="C"/>
<contactref element="R5" pad="2"/>
</signal>
<signal name="N$38">
<contactref element="D6" pad="C"/>
<contactref element="Q3" pad="2"/>
<contactref element="R4" pad="2"/>
</signal>
<signal name="N$39">
<contactref element="Q2" pad="2"/>
<contactref element="D4" pad="C"/>
<contactref element="R3" pad="2"/>
</signal>
<signal name="N$40">
<contactref element="D2" pad="C"/>
<contactref element="Q1" pad="2"/>
<contactref element="R2" pad="2"/>
</signal>
<signal name="N$51">
<contactref element="Q1" pad="3"/>
<contactref element="R12" pad="2"/>
<contactref element="R22" pad="1"/>
<contactref element="C1" pad="1"/>
</signal>
<signal name="N$52">
<contactref element="Q2" pad="3"/>
<contactref element="R13" pad="2"/>
<contactref element="R23" pad="1"/>
<contactref element="C2" pad="1"/>
</signal>
<signal name="N$53">
<contactref element="Q3" pad="3"/>
<contactref element="R14" pad="2"/>
<contactref element="R24" pad="1"/>
<contactref element="C3" pad="1"/>
</signal>
<signal name="N$54">
<contactref element="Q4" pad="3"/>
<contactref element="R15" pad="2"/>
<contactref element="R25" pad="1"/>
<contactref element="C4" pad="1"/>
</signal>
<signal name="N$55">
<contactref element="R17" pad="2"/>
<contactref element="Q6" pad="3"/>
<contactref element="R27" pad="1"/>
<contactref element="C6" pad="1"/>
</signal>
<signal name="N$56">
<contactref element="Q7" pad="3"/>
<contactref element="R18" pad="2"/>
<contactref element="R28" pad="1"/>
<contactref element="C7" pad="1"/>
</signal>
<signal name="N$57">
<contactref element="Q8" pad="3"/>
<contactref element="R19" pad="2"/>
<contactref element="R29" pad="1"/>
<contactref element="C8" pad="1"/>
</signal>
<signal name="N$58">
<contactref element="Q9" pad="3"/>
<contactref element="R20" pad="2"/>
<contactref element="R30" pad="1"/>
<contactref element="C9" pad="1"/>
</signal>
<signal name="N$59">
<contactref element="Q10" pad="3"/>
<contactref element="R21" pad="2"/>
<contactref element="R31" pad="1"/>
<contactref element="C10" pad="1"/>
</signal>
<signal name="N$60">
<contactref element="R26" pad="1"/>
<contactref element="R16" pad="2"/>
<contactref element="Q5" pad="3"/>
<contactref element="C5" pad="1"/>
</signal>
<signal name="-15V">
<contactref element="Q22" pad="3"/>
<contactref element="Q23" pad="3"/>
<contactref element="Q26" pad="1"/>
<contactref element="R67" pad="1"/>
<contactref element="R65" pad="1"/>
<contactref element="C13" pad="-"/>
<contactref element="R55" pad="1"/>
<contactref element="U$2" pad="AB2"/>
<contactref element="R1" pad="1"/>
<contactref element="R1" pad="2"/>
</signal>
<signal name="N$61">
<contactref element="C9" pad="2"/>
<contactref element="R30" pad="2"/>
<contactref element="Q19" pad="2"/>
<contactref element="D29" pad="C"/>
</signal>
<signal name="N$62">
<contactref element="C1" pad="2"/>
<contactref element="R22" pad="2"/>
<contactref element="Q11" pad="2"/>
<contactref element="D21" pad="C"/>
</signal>
<signal name="N$63">
<contactref element="C2" pad="2"/>
<contactref element="R23" pad="2"/>
<contactref element="Q12" pad="2"/>
<contactref element="D22" pad="C"/>
</signal>
<signal name="N$64">
<contactref element="C3" pad="2"/>
<contactref element="R24" pad="2"/>
<contactref element="Q13" pad="2"/>
<contactref element="D23" pad="C"/>
</signal>
<signal name="N$65">
<contactref element="R25" pad="2"/>
<contactref element="C4" pad="2"/>
<contactref element="Q14" pad="2"/>
<contactref element="D24" pad="C"/>
</signal>
<signal name="N$66">
<contactref element="C5" pad="2"/>
<contactref element="R26" pad="2"/>
<contactref element="Q15" pad="2"/>
<contactref element="D25" pad="C"/>
</signal>
<signal name="N$67">
<contactref element="R27" pad="2"/>
<contactref element="C6" pad="2"/>
<contactref element="Q16" pad="2"/>
<contactref element="D26" pad="C"/>
</signal>
<signal name="N$68">
<contactref element="R28" pad="2"/>
<contactref element="C7" pad="2"/>
<contactref element="Q17" pad="2"/>
<contactref element="D27" pad="C"/>
</signal>
<signal name="N$69">
<contactref element="C8" pad="2"/>
<contactref element="R29" pad="2"/>
<contactref element="Q18" pad="2"/>
<contactref element="D28" pad="C"/>
</signal>
<signal name="N$70">
<contactref element="R31" pad="2"/>
<contactref element="C10" pad="2"/>
<contactref element="Q20" pad="2"/>
<contactref element="D30" pad="C"/>
</signal>
<signal name="-8V">
<contactref element="U$2" pad="BR2"/>
<contactref element="Q20" pad="1"/>
<contactref element="Q19" pad="1"/>
<contactref element="Q18" pad="1"/>
<contactref element="Q17" pad="1"/>
<contactref element="Q16" pad="1"/>
<contactref element="Q15" pad="1"/>
<contactref element="Q14" pad="1"/>
<contactref element="Q13" pad="1"/>
<contactref element="Q12" pad="1"/>
<contactref element="Q11" pad="1"/>
<contactref element="D21" pad="A"/>
<contactref element="D22" pad="A"/>
<contactref element="D30" pad="A"/>
<contactref element="D29" pad="A"/>
<contactref element="D28" pad="A"/>
<contactref element="D27" pad="A"/>
<contactref element="D26" pad="A"/>
<contactref element="D25" pad="A"/>
<contactref element="D24" pad="A"/>
<contactref element="D23" pad="A"/>
<contactref element="R56" pad="1"/>
<contactref element="Q22" pad="1"/>
<contactref element="C11" pad="-"/>
</signal>
<signal name="N$71">
<contactref element="R50" pad="1"/>
<contactref element="Q20" pad="3"/>
</signal>
<signal name="N$72">
<contactref element="R49" pad="1"/>
<contactref element="Q19" pad="3"/>
<contactref element="R48" pad="1"/>
</signal>
<signal name="N$73">
<contactref element="Q18" pad="3"/>
<contactref element="R46" pad="1"/>
<contactref element="R47" pad="1"/>
</signal>
<signal name="N$74">
<contactref element="Q17" pad="3"/>
<contactref element="R44" pad="1"/>
<contactref element="R45" pad="1"/>
</signal>
<signal name="N$75">
<contactref element="Q11" pad="3"/>
<contactref element="R32" pad="1"/>
<contactref element="R33" pad="1"/>
</signal>
<signal name="N$76">
<contactref element="Q12" pad="3"/>
<contactref element="R34" pad="1"/>
<contactref element="R35" pad="1"/>
</signal>
<signal name="N$77">
<contactref element="Q13" pad="3"/>
<contactref element="R36" pad="1"/>
<contactref element="R37" pad="1"/>
</signal>
<signal name="N$78">
<contactref element="Q14" pad="3"/>
<contactref element="R38" pad="1"/>
<contactref element="R39" pad="1"/>
</signal>
<signal name="N$79">
<contactref element="Q15" pad="3"/>
<contactref element="R40" pad="1"/>
<contactref element="R41" pad="1"/>
</signal>
<signal name="N$80">
<contactref element="Q16" pad="3"/>
<contactref element="R42" pad="1"/>
<contactref element="R43" pad="1"/>
</signal>
<signal name="N$81">
<contactref element="Q25" pad="3"/>
<contactref element="R64" pad="1"/>
</signal>
<signal name="N$82">
<contactref element="Q25" pad="2"/>
<contactref element="R53" pad="1"/>
<contactref element="Q21" pad="1"/>
<contactref element="C16" pad="1"/>
</signal>
<signal name="N$83">
<contactref element="R50" pad="2"/>
<contactref element="R49" pad="2"/>
<contactref element="R47" pad="2"/>
<contactref element="R45" pad="2"/>
<contactref element="R43" pad="2"/>
<contactref element="R39" pad="2"/>
<contactref element="R41" pad="2"/>
<contactref element="R37" pad="2"/>
<contactref element="R35" pad="2"/>
<contactref element="R33" pad="2"/>
<contactref element="R60" pad="1"/>
<contactref element="Q21" pad="2"/>
<contactref element="C14" pad="1"/>
</signal>
<signal name="OUTPUT">
<contactref element="U$2" pad="BS2"/>
<contactref element="R60" pad="2"/>
<contactref element="R63" pad="1"/>
</signal>
<signal name="N$84">
<contactref element="Q25" pad="1"/>
<contactref element="R63" pad="2"/>
<contactref element="R61" pad="2"/>
<contactref element="C14" pad="2"/>
</signal>
<signal name="N$85">
<contactref element="Q21" pad="3"/>
<contactref element="R54" pad="2"/>
<contactref element="Q21" pad="4"/>
</signal>
<signal name="N$86">
<contactref element="C16" pad="2"/>
<contactref element="R62" pad="2"/>
</signal>
<signal name="N$41">
<contactref element="R7" pad="1"/>
<contactref element="R17" pad="1"/>
<contactref element="R3" pad="1"/>
<contactref element="R13" pad="1"/>
<contactref element="R2" pad="1"/>
<contactref element="R12" pad="1"/>
<contactref element="R11" pad="1"/>
<contactref element="R21" pad="1"/>
<contactref element="R20" pad="1"/>
<contactref element="R10" pad="1"/>
<contactref element="R9" pad="1"/>
<contactref element="R19" pad="1"/>
<contactref element="R18" pad="1"/>
<contactref element="R8" pad="1"/>
<contactref element="R14" pad="1"/>
<contactref element="R4" pad="1"/>
<contactref element="R15" pad="1"/>
<contactref element="R5" pad="1"/>
<contactref element="R16" pad="1"/>
<contactref element="R6" pad="1"/>
<contactref element="R54" pad="1"/>
<contactref element="D32" pad="A"/>
<contactref element="R61" pad="1"/>
<contactref element="C12" pad="-"/>
<contactref element="R55" pad="2"/>
</signal>
<signal name="N$42">
<contactref element="Q23" pad="2"/>
<contactref element="Q26" pad="6"/>
<contactref element="R65" pad="2"/>
</signal>
<signal name="N$43">
<contactref element="R66" pad="1"/>
<contactref element="Q26" pad="4"/>
<contactref element="Q26" pad="3"/>
</signal>
<signal name="N$44">
<contactref element="Q23" pad="1"/>
<contactref element="Q22" pad="2"/>
<contactref element="R59" pad="1"/>
</signal>
<signal name="N$45">
<contactref element="R57" pad="1"/>
<contactref element="R56" pad="2"/>
<contactref element="Q26" pad="5"/>
</signal>
<signal name="N$46">
<contactref element="Q26" pad="2"/>
<contactref element="D33" pad="A"/>
<contactref element="R67" pad="2"/>
</signal>
</signals>
</board>
</drawing>
</eagle>
