Fully integrated two-way radio transmitter utilizing current mod

Details Fully integrated two-way radio transmitter utilizing current mod Fully integrated two-way radio transmitter utilizing current mod

1996-11-05

1999-04-06

Crosland, Donnie L.

Telecommunications

Transmitter

Frequency conversion

455 73, 455 87, 455 78, 455 91, H04B 138

Patent

active

058930272

ABSTRACT:
A wideband fully integrated two-way radio transmitter (100) includes a voltage controlled oscillator (VCO) (101) for providing a voltage at a radio frequency. A divider (103) is used reducing the radio frequency (RF) signal from the VCO to a an intermediate frequency. A voltage-to-current converter is used for changing the voltage of the intermediate frequency RF signal to an RF current. A transmit buffer is then used for amplifying the RF current supplied by the voltage-to-current converter for amplification by a power amplifier. The fully integrated current mode transmit buffer offers the advantage of amplification over a large bandwidth while providing isolation between the transmit buffer and the VCO.

REFERENCES:
patent: 4972346 (1990-11-01), Kawano et al.
patent: 5438703 (1995-08-01), Ng et al.

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