Standard frequency generator for radio communications transceiver

摘要

The frequency generator has a reference oscillator arrangement (1), which includes a variable frequency divider (13) for converting the output signals, from a direct digital synthesiser (12), by an appropriate frequency division. This is supplied with frequency setting parameters for a required frequency output, in dependence on the supplied frequency division parameters. The output from the reference oscillator is fed to a phase comparator (21) within a phase locked loop (2) arrangement acting as a standard frequency generator. A second frequency divider (24) is supplied with different frequency division parameters than those supplied to the first divider.