Amplifiers – With semiconductor amplifying device – Including differential amplifier
Reexamination Certificate
2006-03-21
2006-03-21
Nguyen, Khanh V. (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including differential amplifier
C330S260000, C330S297000, C323S315000
Reexamination Certificate
active
07015757
ABSTRACT:
A transconductance amplifier with multi-emitter structure for balancing current of a multi-phase regulator including multiple transistors, a bias current device, multiple current mirrors, and multiple current sources. Each transistor has first and second current terminals and a current control terminal receiving a corresponding one of multiple sense voltages. Each sense voltage is indicative of output inductor current of a corresponding phase of the multi-phase regulator. The bias current device is coupled to the first current terminal of each transistor. Each current mirror has an input coupled to a second current terminal of a corresponding transistor and an output coupled to a corresponding one of multiple correction nodes. Each current source is coupled to a corresponding one of multiple correction nodes. In this manner, each correction node provides a correction current for a corresponding phase of the regulator.
REFERENCES:
patent: 6181203 (2001-01-01), Newlin
Microsemi Intergrated Products, Preliminary Data Sheet LX1677 AMD64 Processor VRM Controller, Copyright 2000 Revised Mar. 3, 2003, pp. 1-16, Microsemi Garden Grove, California, U.S.A.
Jochum Thomas A.
Li Xuening
Intersil America's Inc.
Nguyen Khanh V.
Stanford Gary R.
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