Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Reexamination Certificate
2009-11-20
2011-11-15
Wells, Kenneth B. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
C327S308000, C327S382000, C333S103000
Reexamination Certificate
active
08058922
ABSTRACT:
Switches with improved biasing and having better isolation and reliability are described. In an exemplary design, a switch is implemented with a set of transistors, a set of resistors, and an additional resistor. The set of transistors is coupled in a stacked configuration, receives an input signal, and provides an output signal. The set of resistors is coupled to the gates of the set of transistors. The additional resistor is coupled to the set of resistors and receives a control signal for the set of transistors. The resistors reduce signal loss through parasitic capacitances of the transistors when they are turned on. The resistors also help split the signal swing of the input signal approximately evenly across the transistors when they are turned off, which may improve reliability of the transistors. The switch may be used in a switchplexer, a power amplifier (PA) module, etc.
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International Search Report and Written Opinion—PCT/US2010/043596, International Search Authority—European Patent Office—Sep. 23, 2010.
Mobarhan Ramin
QUALCOMM Incorporated
Wells Kenneth B.
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