Apparatus for clock shifting in an integrated transceiver

Details Apparatus for clock shifting in an integrated transceiver Apparatus for clock shifting in an integrated transceiver

1997-03-03

1999-07-20

Pham, Chi H.

Pulse or digital communications

Receivers

Interference or noise reduction

375219, 375371, 455296, H03D 104, H03K 501, H04B 110, H04L 100

Patent

active

059265140

ABSTRACT:
A radio (100) having an integrated transceiver circuit (102) avoids circuit crosstalk through the use of a clock shifter circuit (120). The radio includes a microcontroller unit (MCU) (104) controlled by a MCU clock. A channel selector (116) coupled to the MCU (104) provides a selected frequency channel while memory (106) downloads channel information which includes integer clock shifter ratios assigned to each channel. The integrated transceiver (102) includes a clock shifter circuit (120) which divides a reference signal into a clock frequency and provides this clock frequency to the MCU (104) as the MCU clock. The MCU (104) reprograms the clock shifter circuit (120) with one of the integer clock shifter ratios to generate a shifted MCU clock frequency if the selected frequency channel is susceptible to harmonics of the MCU clock.

REFERENCES:
patent: 5225792 (1993-07-01), Prakash
patent: 5454118 (1995-09-01), Simmons et al.
patent: 5734975 (1998-03-01), Zele et al.
patent: 5745848 (1998-04-01), Robin

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