Amplifiers – With semiconductor amplifying device – Including field effect transistor
Reexamination Certificate
2008-06-23
2010-02-09
Pascal, Robert (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including field effect transistor
C330S291000
Reexamination Certificate
active
07659781
ABSTRACT:
An active resistor and its use in a negative feedback amplifier allow wide voltage swings on the input and output signals. One embodiment includes parallel pass-gate MOS transistors of opposite conductivity types connected between the input and output nodes. Bootstrapping transistors are connected between the gates of the pass-gate transistors and respective bias voltages. Coupling capacitors are connected between the gates and the output node. Additional coupling capacitors may be connected between the gates and the input node to make the resistor symmetric. In other embodiments, only one pass-gate transistor is used.
REFERENCES:
patent: 5617064 (1997-04-01), Gorecki
patent: 6657507 (2003-12-01), Fulton et al.
Robert J. Drost et al., Proximity Communication, Sep. 2004, IEEE Journal of Solid-State Circuits, vol. 39, No. 9, Sep. 2004.
Chow Alex
Drost Robert J.
Hopkins Robert D.
Nguyen Hieu P
Park Vaughan & Fleming LLP
Pascal Robert
Sun Microsystems Inc.
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