Miscellaneous active electrical nonlinear devices – circuits – and – Specific input to output function – Combining of plural signals
Patent
1997-10-31
1999-09-28
Wells, Kenneth B.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific input to output function
Combining of plural signals
327357, 327552, G06F 744
Patent
active
059594918
ABSTRACT:
A circuit and method are shown for suppressing a common-mode noise signal in a pair of differential balanced-modulated color signals. A complementary balanced-modulated color signal, which includes the common-mode noise signal, inverse modulates a first current in a first transistor which is connected in series with a second transistor. The second transistor sinks a second current responsive to a common base current. A balanced-modulated color signal, which also includes the common-mode noise signal, inverse modulates the current in a third transistor which is connected in series with a fourth transistor. The fourth transistor sinks a fourth current responsive to the common base current. The common base current is produced by driving a fifth transistor with the first current less the second current signal. An output signal that is free of the common mode noise signal is produced by subtracting the fourth current from the third current.
REFERENCES:
patent: 4755767 (1988-07-01), Yamatake
patent: 5512857 (1996-04-01), Koskowich
Samsung Electronics Co,. Ltd.
Wells Kenneth B.
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