Flexible dynamic range amplifier

Details Flexible dynamic range amplifier Flexible dynamic range amplifier

2011-01-18

2011-01-18

Choe, Henry K (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S261000

Reexamination Certificate

active

07872530

ABSTRACT:
An amplifying device (10) includes first, second, third and fourth transistors (M1, M2, M3, M4). In the first and third transistors (M1, M3) the source is connected to an input signal source (IN+, IN−), the gate is connected to a biasing potential (VB) and the drain is connected to a signal output (O+, O−). There is a first and second branch (B1, B2) between the source and drain of the first and third transistor (M1, M3), respectively, each including a corresponding second or fourth transistor (M2, M4). The device also includes a third branch (B3) comprising a first capacitor (C1) and a first switch (SW1) connected between the first transistor (M1) source and the third transistor (M3) gate, and a fourth branch (B4) comprising a second capacitor (C2) and a second switch (SW2) connected between the third transistor (M3) source and the first transistor (M1) gate.

REFERENCES:
patent: 5212455 (1993-05-01), Pernici et al.
patent: 7489193 (2009-02-01), Adachi
patent: 7737782 (2010-06-01), Sudou
patent: 7786799 (2010-08-01), Bhattacharya et al.
patent: 1748553 (2007-01-01), None
patent: 2004/098048 (2004-11-01), None
Garcia, P. et al. “Improved High Dynamic Range Switched Gain Low-Noise Amplifier for Wide-Band CDMA Applications.” Proceedings of the 27th European Solid-State Circuits Conference (ESSCIRC 2001), Sep. 18-20, 2001.

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