Electronics Letters · 2004 · 12 citations · 5 references
EngineeringElectrical EngineeringAnalog ElectronicsMicrowave EngineeringVariable Rate TechnologyPower AmplifiersRadio-frequency Integrated CircuitsReceiver SystemsUltra-wideband CommunicationCode Division Multiple AccessFrequency Division Multiple AccessHigh-gain AmplifiersLinear CharacteristicParasitic CouplingTemperature CompensationTemperature Compensation MechanismsVariable Gain Control
A novel intermediate-frequency variable-gain amplifier for wideband code-division multiple access transmitters is presented. The circuit includes a compensation technique for parasitic coupling, which allows a high dynamic range of 85 dB to be attained while using a single variable-gain stage. Temperature compensation and decibel-linear characteristic are achieved by means of a control circuit providing a lower than ±1.5 dB gain error over full temperature and gain ranges.
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