Miscellaneous active electrical nonlinear devices – circuits – and – Specific signal discriminating without subsequent control – By amplitude
Patent
1994-04-04
1995-09-05
Cunningham, Terry D.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific signal discriminating without subsequent control
By amplitude
327 78, 327 82, 327198, 327291, 327312, 327482, 327563, 327355, H03K 524
Patent
active
054481880
ABSTRACT:
A signal processing device for selectively producing as an output signal either a signal corresponding to an input signal r a signal which may be a fixed voltage level for muting purposes or a mixed signal. A current switch composed of pairs of differential transistors switches Among a plurality of current paths in accordance with a difference between the voltage levels of a pair of input signals varying in level in phase opposition to each other, or in accordance with a difference between the voltage levels of a reference voltage and a signal phase input signal. A load circuit composed of a plurality of resistors is connected in series with one of the current paths. A current bypass forming circuit which forms a current bypass of a constant current at a desired timing corresponding to a pulse signal with respect to the current path forming the load circuit effects the generation of an output signal not corresponding to the input signal, that is, a fixed voltage for muting the mixed signal.
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Matsumoto Motoaki
Sato Yoshihiko
Cunningham Terry D.
Fuji Photo Film Co. , Ltd.
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