_10000_V

Published:2009/7/15 21:22:00 Author:Jessie | From:SeekIC

Uses LM301A opamp with 1N825 6.2-V zener reference diode (not zener regulator diode) to maintain stable DC voltage under severe combinations of temperature, shock, and vibration. Gain resistors R2 and R3 should have same 0.01%/℃ temperature coefficients as reference diode. R1 is RN55 511-ohm metal-film resistor, R2 is RN55E 6.04K metal-film resistor, and R3 is RN55E 3.57K metal-film resistor. R4 and R5 are gain trim resistors. R6 should equal parallel combination of R2 and R5. R8 is 10K cermet pot. with R7 (optional) 100K to 1 megohm. Article tells how to trim circuit for desired out-put and how to calculate values of resistors and temperature coefficients for other output volt-ages.-D. W. Ishmael, Precision +10.000 V DC Voltage Reference Standard, 73 Magazine, Sept. 1975, p 124-126.



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