Architecture for cordless telephones

Details Architecture for cordless telephones Architecture for cordless telephones

H - Electricity

04

M

H04M 1/725 (2006.01) H04B 1/40 (2006.01)

Patent

CA 2401183

An analog cordless telephone has a handset and a base. The handset and/or the base of the telephone may include the following components. A phase locked loop (PLL) and a voltage controlled oscillator (VCO), adapted to be shared between a receive path and a transmit path. A first analog gate is adapted to gate a received audio signal on and off, in response to a clock signal. A second analog gate is adapted to gate a transmit audio signal on and off, in response to an inverted version of the clock signal. The transmit audio signal is enabled when the received audio signal is gated off, and the VCO is further adapted to be modulated by the enabled transmit audio signal to output a modulated RF signal.

La présente invention concerne un téléphone sans fil analogique comprenant un combiné et une base. Le combiné et/ou la base comportent plusieurs éléments constitutifs. Une boucle PLL et un oscillateur commandé en tension sont conçus pour être utilisés en partage entre un chemin de réception et un chemin d'émission. Une première porte analogique est conçue pour accepter ou refuser un signal audio reçu en réaction à un signal d'horloge. Une seconde porte analogique est conçue pour accepter ou refuser un signal audio en émission en réaction à une version inversée du signal d'horloge. Le signal audio en émission est validé lorsque le signal audio reçu est refusé. En outre, l'oscillateur commandé en tension est également conçu pour être modulé par le signal audio en émission validé de façon à donner en sortie un signal HF modulé.

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