Telecommunications – Transmitter – Angle modulation
Patent
1995-07-17
1998-04-14
Pham, Chi H.
Telecommunications
Transmitter
Angle modulation
455119, 331117D, 331115, H04B 104
Patent
active
057405220
ABSTRACT:
Reduction of transmitter exciter chain generated noise from the receive bank of a portable/hand-held duplex transceiver is achieved using a high output power, low-noise voltage-controlled-oscillator (VCO) in the transmitter exciter chain. Using this high-power, low-noise oscillator as the RF source in the transmitter exciter chain precludes the need for the conventional buffer/driver amlplifier stage and an associated inter-stage noise filter. Elimination of buffer/driver stage components and bulky inter-stage noise filter components allows complete integration of transmitter exciter chain components resulting in reduced size and cost.
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Dolman Rodney A.
Lampe Ross W.
Zhou Xue-Song
Ericsson Inc.
Pham Chi H.
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