Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – Nonlinear amplifying circuit
Patent
1997-05-08
1998-10-27
Tran, Toan
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
Nonlinear amplifying circuit
327 63, 330254, G06G 712
Patent
active
058282653
ABSTRACT:
A differential pair with input transistors and provided with a variable degeneration resistor. The degeneration resistor comprises a series arrangement of two branches of coupled resistors which are shunted in mutually corresponding points by respective control transistors whose gates are interconnected. The differential pair further comprises a control loop comprising two current mirrors a bias resistor and a current source for providing a control signal to the gates of the control transistors. The control loop does not influence the DC bias of the differential pair.
REFERENCES:
patent: 4345214 (1982-08-01), Harford
patent: 5198780 (1993-03-01), Kase
patent: 5210504 (1993-05-01), Yagita et al.
patent: 5371475 (1994-12-01), Brown
patent: 5612648 (1997-03-01), McClellan et al.
Mensink Clemens H. J.
Nauta Bram
Biren Steven R.
Tran Toan
U.S. Philips Corporation
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