Bruno Scheckel

TV and TVSAT mixer-oscillator PLL ICs

Two mixer-oscillator PLL ICs were developed to convert the desired TV-RF (45 MHz-1000 MHz) or TVSAT-RF (700 MHz-2500 MHz) to standard IF for TV or TVSAT sets and setstop baseband converters. Only two switched bands cover the complete frequency range of the TV or TVSAT channels. These ICs combine analog (mixer-oscillator) and a complete digital (PLL) functionality. >

1.3 GHz Pll With 12C.Bus

A single chip PLL IC for digital tuning application up to 1.3 GHz is described. It is part of a new family of analog and digital TV-ICs, which are functionally controlled via a common 2-wire bi-directional I2C Bus (Inter-Integrated Circuit Bus) by a single chip microcomputer.

A 120 MHz AM/FM PLL-IC with Dual On-Chip Programmable Charge Pump/Filter OP-AMP

In the past single chip frequency synthesizer tuning systems have been developed which are suitable for simple radio sets, but bring problems if designed into more sophisticated radios. Separation of the control and display functions from the tuning function allow the PLL circuit to be situated near the tuners and the control and display function near the front of the receiver. This minimises internal radiation as well as the number and length of internal interconnections.