Encoding circuit for a secam colour television transmitter

Details Encoding circuit for a secam colour television transmitter Encoding circuit for a secam colour television transmitter

H - Electricity

04

N

350/41

H04N 9/04 (2006.01) H04N 11/18 (2006.01)

Patent

CA 1154148

22.1.8O 1 PHN.9503 ABSTRACT "An encoding circuit for a SECAM colour television transmitter" An encoding circuit for a SECAM colour television transmitter having a frequency modulator circuit for a modulating signal which comprises two colour difference signals which follow one another line-sequen- tially and are controlled by means of two phase control loops and two reference signal generators. A first reference signal generator has one of the reference fre- quencies whereas the frequency of the signal generated by the second reference signal generator is a harmonic of the line frequency. The phase control loop to which the second reference signal generator is connected comprises a sample and hold circuit which is operative at field frequency.

354237

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