Differential output circuit

Details Differential output circuit Differential output circuit

1997-11-06

2000-02-22

Wells, Kenneth B.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Amplitude control

327 65, 327109, 327 52, H03L 500

Patent

active

060284676

ABSTRACT:
A differential output circuit has first and second output lines and an output impedance connected between the first and second lines. The output impedance includes an active device (e.g., a field effect transistor) having a control input for receiving a control signal value for controlling the impedance value of the active device. A bias circuit is responsive to a reference impedance element for generating the control signal value for controlling the impedance value of the active device. An output driver stage is connected to the first and second output lines for supplying first and second differential driven output signals to the first and second output lines, respectively. An integrated circuit can include a number of differential output circuits and a common bias circuit responsive to a single reference impedance element for generating the control signal value for controlling the impedance value of each active device.

REFERENCES:
patent: 5227681 (1993-07-01), Koyama et al.
patent: 5274275 (1993-12-01), Colles
patent: 5396028 (1995-03-01), Tomassetti
patent: 5525919 (1996-06-01), Phelan
patent: 5532616 (1996-07-01), Keeney

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