A Single Chip PLL IC with a 150 MHz Dual Modulus Prescaler

Frequency synthesizers have been introduced into many TV sets due to the advantages of direct channel selection and the stability of the tuner oscillator.

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[2]  B. Scheckel,et al.  A 120 MHz AM/FM PLL-IC with Dual On-Chip Programmable Charge Pump/Filter OP-AMP , 1981, IEEE Transactions on Consumer Electronics.