Published:2009/6/30 2:20:00 Author:May | From:SeekIC
Combination of National AM97C11 quad FET and LM324 quad opamp gives tracking gain control having 40-dB range. Bandwidth is 10 kHz minimum, and S/N ratio is better than 70 dB for 4.3-VRMS maximum output. Temperature sensitivity of FET can be reduced by using silicon resistor for opamp feedback resistor R1.- FET Databook, National Semiconductor, Santa Clara, CA, 1977, p 6-39-6-46.
Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Control_Circuit/OUAD_GAIN_CONTROL.html
Print this Page | Comments | Reading(3)
Code: