Stabilized frequency and phase locked loop with saw devices on c

Details Stabilized frequency and phase locked loop with saw devices on c Stabilized frequency and phase locked loop with saw devices on c

1992-10-27

1994-07-12

Powell, Mark R.

Television

Receiver circuitry

Tuning

348536, 333193, 455333, 4551831, H04N 550

Patent

active

053293193

ABSTRACT:
A television receiver includes a long loop frequency and phase locked loop (FPLL) in which the tuner voltage is controlled by the output voltage of the FPLL. A SAW bandpass filter couples the IF signal from the tuner to a synchronous demodulator and to the FPLL. An oscillator includes a SAW resonator that is formed on the same substrate as the SAW bandpass filter for supplying a reference signal to the FPLL and to the synchronous demodulator. The common substrate assures tracking between the IF SAW bandpass filter and the oscillator SAW resonator with temperature changes and processing variations.

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patent: 4823399 (1989-04-01), George
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patent: 5029237 (1991-07-01), Ragan

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