Pulse or digital communications – Pulse width modulation
Reexamination Certificate
2006-12-12
2006-12-12
Pham, Long (Department: 2814)
Pulse or digital communications
Pulse width modulation
C379S401000, C379S402000, C379S403000, C257S007000
Reexamination Certificate
active
07149246
ABSTRACT:
A monolithic transceiver integrated circuit that includes a substrate, a transmitter subsystem of one or more subcircuits on the substrate, and a receiver subsystem of one or more subcircuits on the substrate. Also included is a bias current supply coupled to the receiver and transmitter subsystems to provide bias current. The bias current supply includes a first bias circuit on the substrate coupled to, and to supply bias current to, a first subcircuit of the transmitter subsystem. The first bias circuit includes a first current modulator having a first switch input to indicate that the bias current is to start or stop being supplied to the first subcircuit. The first current modulator is to control the rate of change of supplied bias current in response to the first switch input. The first subcircuit may be a power amplifier. The control of the rate of change reduces oscillator pull in at least one oscillator included in the integrated circuit.
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Adams Andrew
Weste Neil
Cisco Systems Wireless Networking (Australia) Pty Limited
Inventek
Pham Long
Rao Shrinivas H.
Rosenfield Dov
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