Phase locked loop structure for cellular phone, controls multiplexer to forward signal originating from transmission voltage control oscillator or from reception voltage control oscillator, to reception local oscillation output

摘要

A control unit (32) connected to a control input of a multiplexer (30), controls the multiplexer to forward a signal originating from the transmission voltage control oscillator (VCO) (13) or from the reception VCO (28), to the reception local oscillator output (27). Independent claims are also included for the following: (1) communication unit; and (2) method of providing local oscillator signal.