Telecommunications – Transmitter – Power control – power supply – or bias voltage supply
Reexamination Certificate
2004-03-17
2008-08-12
Urban, Edward (Department: 2618)
Telecommunications
Transmitter
Power control, power supply, or bias voltage supply
C455S114300, C455S127500
Reexamination Certificate
active
07412216
ABSTRACT:
A radio transmitter includes a transmitter circuit which produces a signal at a first frequency, and has digital divider circuitry, for dividing the first frequency to produce a signal at a second frequency. The noise performance of the digital divider is adjusted, depending upon the transmitter output power. Specifically, the digital divider is operated with a relatively good noise performance when the gain of the power amplifier is high, and is operated with a worse noise performance at low output powers. This can ensure that a specified noise requirement is met, without excessively increasing the power consumption or the size of the device.
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Cameron Michael
Hannon Christian A
Telefonaktiebolaget L M Ericsson (Publ)
Urban Edward
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