Philips Semiconductors B.V.

Low cost DECT Power Amplifier

PH97005

Preliminary Application Note

RNR-T45-97-M-0931

Author

L.C. Colussi

November 21, 1997

Discrete Semiconductors Nijmegen

Gerstweg 2, 6534 AE Nijmegen

The Netherlands

Keywords

PA, DECT, DPO, BFG425W, BFG21W

Abstract

Application of new

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two-stage power amplifier for DECT systems, having a power gain of 26 dB and an overall

efficiency better than 40%. The amplifier operates from a single supply voltage, includes bias

circuitry for load pow er adjustment and on/off switching and is mounted on a bilayer pcb,

requiring 10 x 20 mm. A description is given of the circuit design and the board layout, including

measurement results.