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15_12_V_FOUROUTPUT

2015-03-17 11:36  
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15_12_V_FOUROUTPUT
Single LM113 1.22-V stable reference is driven by 1-mA FET constant-current source to provide highly stable low-voltage standard driving four adjustable-gain opamps. Gain of each is set to give desired output reference voltage in range from 1.5 to 12 V. Use cermet trimmers and metal-oxide fixed resistors in opamp feedback circuits to achieve stabilities of several millivolts over 0 to 70℃ range.-H. Olson, Two IC's and FET Provide Quad Stable Reference, EDN Magazine, Jan. 20, 1974, p 82.