Patent ID: 6847812

Claim:
A transceiver configuration for a communication terminal, comprising: an A/D converter outputting a first digital data signal; a D/A converter; a controllable oscillator circuit connected to said A/D converter and to said D/A converter, said controllable oscillator circuit having a reference oscillator with an oscillating crystal as a resonator and outputs a sampling clock received by said A/D converter and said D/A converter; a digital data processing circuit connected to said A/D converter and to said D/A converter and receives the first digital data signal output by said A/D converter and processes it further and outputs a second digital data signal to said D/A converter; said A/D converter, said D/A converter, said data processing circuit and said controllable oscillator circuit, apart from said oscillating crystal of said reference oscillator, being constructed as a monolithically integrated circuit so that of said controllable oscillator circuit, only said oscillating crystal is implemented as an external component; and a frequency section being at least one of a radio-frequency section and an intermediate-frequency section connected to said A/D converter, to said D/A converter and to said controllable oscillator circuit, said frequency section having a frequency converter stage operating with a beat frequency derived from said controllable oscillator circuit.