SYNTHESIZED CLOCK GENERATOR FOR COMMUNICATION DEVICE
Original Publication Date: 1993-Oct-01
Included in the Prior Art Database: 2002-Feb-21
The new generation of communication equip- ment usually employs one or more microprocessors for controlling and signalling functions. The microprocessor requires a master clock signal for proper operation. This master clock for the micro- processor is usually a full digital level signal with frequency in the order of several to tens of MHz. The harmonics ofthis microprocessor clock and the sub-multiples of the clock frequency from the microprocessor's input and output ports can easily interfere with other part of the more sensitive circuitries in the communication equipment. For example, harmonics of the microprocessor clock can fall within the passband of one of the channels of a transceiver and interfere with the normal transceiver operation.