Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – Nonlinear amplifying circuit
Patent
1998-06-04
2000-05-30
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
Nonlinear amplifying circuit
327 67, 327112, 326 89, 326126, 330260, H03F 345
Patent
active
060695234
ABSTRACT:
A digital data driver includes a differential amplifier having transistors which operate as a push-pull amplifier in class C mode. The transistors are conductive or non-conductive and controlled in response to a differential data input signal. The driver provides current to a load resistor of an external equipment and the direction of the current flowing therein is reversed in response to the input data. The differential amplifier transistors are connected to other transistors which provide source impedance to the external equipment. The source impedance of the driver is a controllable characteristic impedance of e.g., 50 .OMEGA..
REFERENCES:
patent: 4651038 (1987-03-01), Cline et al.
patent: 4795916 (1989-01-01), Liron
patent: 5185582 (1993-02-01), Barbu
patent: 5382838 (1995-01-01), Sasaki et al.
patent: 5418492 (1995-05-01), Wang et al.
patent: 5530444 (1996-06-01), Tice et al.
Callahan Timothy P.
de Wilton Angela C.
Englund Terry L.
Nortel Networks Corporation
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