Appeal No. 2000-1939
Application 08/791,281
switched, the other terminal being permanently connected to the
negative input terminal of operational amplifier 19. Switching
is effected by transistor switches 24 and 26 in response to clock
signals N2 and N3 , shown in Figure 4, also reproduced below.
Specifical ly, switch 26
is closed at time T1 in
response to each
positive-going pulse of clock signal N3, whose frequency is about
-8-
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