H - Electricity – 03 – G
Patent
H - Electricity
03
G
352/20.8
H03G 3/30 (2006.01) G11B 5/592 (2006.01) G11B 15/14 (2006.01) G11B 20/00 (2006.01) H03F 3/72 (2006.01)
Patent
CA 1215173
SIGNAL PROCESSING CIRCUITS ABSTRACT OF THE DISCLOSURE A signal processing circuit comprises an amplifying circuit portion having an input terminal connected to a signal source, an output terminal for delivering an amplifier signal therefrom and a control terminal, a capacitive device coupled to the control terminal for serving as a bypass capacitor for the amplifying circuit portion, a charging circuit portion connected to the control terminal for forming a path for a charging current to the capacitive device, a discharging circuit portion also connected to the control terminal for forming a path for a discharging current from the capacitive device, and a control circuit portion having a terminal supplied with a control signal taking at least first and second states and being operative to control both the charging and discharging circuit portions. The control circuit portion controls the charging circuit portion to allow the charging current to flow to the capacitive device so as to produce thereat a potential for making the amplifying circuit portion inoperative when the control signal is turned to take the first state and also control the discharging circuit portion to allow the discharging current to flow from the capacitive device so as to produce a potential thereat for making the amplifying circuit portion operative when the control signal is turned to take the second state.
444387
Gowling Lafleur Henderson Llp
Sony Corporation
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