| Publisher | Agilent Technologies | ||
|---|---|---|---|
| Format | 147.5KB PDF | Date added | 02 Oct 2003 |
| Topics | Mobile - Wireless Communications, GSM | ||
| Downloads | 98 | ||
This paper describes the GSM transmitter system with a description of gain control closed loop theory and practical implementation of power control circuitry for a mobile phone transmitter. Loop type, gain, bandwidth and stability have been discussed linked with a number of specific mobile radio design considerations. The proposed control loop design has been implemented with excellent results using Agilent E-pHEMT power amplifier ACPM-7891. Output power is controlled in 2 dB steps across the required range and power level variations under extreme conditions are well within specified tolerances.
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