A TV-PLL-circuit for automatic tuner alignment

Author

Lehning, H.

Author_Institution

Motorola Inc., Geneva, Switzerland

fYear

1988

fDate

8-10 June 1988

Firstpage

274

Lastpage

275

Abstract

Modern highly integrated TV systems are MCU controlled (12C-bus) and replace mechanical adjustment by electronic alignment. The integrated circuit described has been developed for such a system. The IC contains all PLL functions that are required to control a TV local oscillator and also includes a D to A converter section that generates three further varicap voltages for optimum control of the tuner filters. The unique feature of the IC is that it generates the four varactor control voltages on chip in a range of up to 30 V and that it also contains the PLL functions that require high frequency operation (1.3 GHz).<>

Keywords

bipolar integrated circuits; optimal control; phase-locked loops; television equipment; tuning; variable-frequency oscillators; voltage control; 0 to 30 V; 1.3 GHz; D to A converter; IC; MCU controlled; TV-PLL-circuit; UHF; automatic tuner alignment; electronic alignment; integrated circuit; local oscillator; optimum control; tuner filters; varicap voltages; Automatic control; Automatic generation control; Control systems; Filters; Local oscillators; Phase locked loops; TV; Tuners; Voltage control; Voltage-controlled oscillators;

fLanguage

English

Publisher

ieee

Conference_Titel

Consumer Electronics, 1988. Digest of Technical Papers. ICCE., IEEE 1988 International Conference on

Conference_Location

Rosemount, IL, USA

Type

conf

DOI

10.1109/ICCE.1988.10794

Filename

10794