Amplifier circuit having constant output swing range and...

Details Amplifier circuit having constant output swing range and... Amplifier circuit having constant output swing range and...

2007-03-06

2007-03-06

Nguyen, Long (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

C327S562000, C327S563000

Reexamination Certificate

active

11071433

ABSTRACT:
Provided is an amplifier circuit having a constant output swing range and a stable delay time, where the amplifier circuit includes a first bias unit, a second bias unit, a comparison unit, and an amplifier unit, and the first bias unit responds to an internal reference signal with a predetermined voltage level and maintains constant the amount of a first current, and the second bias unit receives an external reference signal, responds to a control voltage, and controls the amount of a second current to be the same as the amount of the first current, and the comparison unit compares a voltage level of a first node with a voltage level of a second node, and controls a voltage level of the control voltage according to the comparison result, and the amplifier unit compares a voltage level of an external input signal with a voltage level of the external reference signal, amplifies and outputs a voltage difference between the two compared signals, responds to the control voltage, and controls the amount of a third current to be the same as the amount of the first current although the level of the external reference signal is varied, such that the amplifier circuit and a circuit for receiving data can maintain a constant output swing range and a stable delay time irrespective of variations in the voltage levels of the external input signal or the external reference signal.

REFERENCES:
patent: 5451898 (1995-09-01), Johnson
patent: 6191624 (2001-02-01), Matsuya
patent: 6501317 (2002-12-01), Lin et al.
patent: 7109761 (2006-09-01), Isomura
patent: 11-266152 (1999-09-01), None
patent: 15-188927 (2003-04-01), None
patent: 2002-001564 (2002-01-01), None
patent: 2002-044417 (2002-06-01), None
patent: 2002-058491 (2002-07-01), None

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