Bipolar/MOS High-Speed Divider and Phase Comparator.
Final technical rept. 1 Jul 69-30 Jun 70,
RCA SOLID STATE DIV SOMERVILLE NJ
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A COSMOS phase comparator was designed and breadboarded, using discrete components. When the breadboarded phase comparator was tested in a breadboarded frequency synthesizer, it showed improved performance over previous circuits. An integrated circuit IC version of the comparator was fabricated on a 63- by 70-mil chip. The performance of this IC was comparable, with the exception of output noise ripple, to that of the breadboard circuit when external resistors were used to correct for offcenter biasing. It is believed that the increased output noise ripple is due to a leakage path in the IC. This leakage path could easily be corrected in a modified IC design. A divide-by-K K8 counter breadboard was constructed, using available ICs. This counter met system requirements. A divide-by-N programmable counter was designed, using available ICs. This counter met system requirements. An improved divide-by-R counter was designed and breadboarded, using three available COSMOS IC packages and one TTL IC. It met the synthesizer system requirements. Three voltage-controlled oscillators covering the required 225 to 400 megahertz tuning range were developed. A high-voltage loop amplifier, which eliminates the need for coarse tuning circuits in the synthesizer, was constructed and assembled. Author
- Electrical and Electronic Equipment