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...

2007-01-26

2008-07-15

Wells, Kenneth B. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

C327S057000

Reexamination Certificate

active

07400177

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: 5355391 (1994-10-01), Horowitz et al.
patent: 5977798 (1999-11-01), Zerbe
patent: 6310501 (2001-10-01), Yamashita
patent: 6885222 (2005-04-01), Sato
patent: 2005/0162193 (2005-07-01), Payne et al.

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