Patent ID: 6697438
Filing Date: 2004-02-24
Classification: H04B

Abstract:
A circuit configuration for a multistandard communications terminal, the configuration comprising:a radio frequency component for receiving RF input signals of different system standards, said radio frequency component including a receiver conversion stage for converting an RF receive signal into an analog receive signal through downconversion using a predefined conversion frequency, the RF receive signal being formed from at least one of the received RF input signals; and a signal-processing circuit including an A/D converter for converting the analog receive signal into a digital receive signal; said signal-processing circuit including a selection unit having a digital filter that receives the digital receive signal and outputs a bandwidth-limited digital output signal; said digital filter having a variably adjustable pass-band; the pass-band being set according to a required one of the different system standards; and said digital filter including a programmable read-only memory storing a table that allocates a set of filter coefficients to each one of the different system standards.