Differential common mode logic driver with switching control...

Details Differential common mode logic driver with switching control... Differential common mode logic driver with switching control...

2009-12-07

2010-10-05

Le, Don P (Department: 2819)

Electronic digital logic circuitry

Function of and, or, nand, nor, or not

Field-effect transistor

C326S083000

Reexamination Certificate

active

07808281

ABSTRACT:
A differential CML driver includes an output stage, a control circuit and a reference circuit. The output stage includes a first loading component, a second loading component, a bias component, a first metal-oxide-semiconductor (MOS) transistor and a second MOS transistor. The control circuit is coupled to the output stage and is for receiving a reference bias voltage, a first input signal and a second input signal to make one of the first and the second MOS transistor enter a cut-off region and the other of the first and the second MOS transistor enter a saturation region. The reference circuit is coupled to the output stage and the control circuit, and is for generating a common-mode voltage according to first and second output voltages of the output stage, and outputting the reference bias voltage to the control circuit according to the common-mode voltage.

REFERENCES:
patent: 7521976 (2009-04-01), Sudjian et al.
patent: 7656204 (2010-02-01), Henzler et al.

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