C-MOS GW Detector
( Circuit # 110-A )

( 10-26-1989 )

A. Circuit (# 110, modified with l/f and oscillator modes added):

Note: Ckt. #110 originally made 8-6-1986

B. Remarks:

1. This is basic QND GW detector with:

a. l/f noise mode added by adding in shunt capacitor, C1, (by closing red push button switch, SW₁) to cancel out the ‘burst’ pulse signals.

b. Oscillator mode is activated by closing black push button switch, SW₂, to place capacitor, C₂, across detector output.

2. ICL 7621 is a C-MOS op-amp device which works well at 1.5 volts supply and which can have output voltages run rail-to-rail.

3. The 10K gain control, R₁, is an internal trim-pot generally set near its mid-point or slightly higher.

4. The 1.5 volt power supply are AAA cells contained… [last line missing in photocopy]