Odd harmonic signal generator

Details Odd harmonic signal generator Odd harmonic signal generator

1983-09-30

1986-05-20

Shepperd, John W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

331 76, 331 77, 363163, H04N 978, H02M 5275

Patent

active

045905134

ABSTRACT:
Odd harmonic generator includes two amplitude limiting amplifiers and a frequency selective signal combining network. Sinusoidal signal at frequency of chrominance subcarrier is applied to inputs of both amplifiers. The first amplifier provides signal comprising fundamental and odd harmonic frequency components. The second amplifier provides signal comprising a fundamental frequency component and odd harmonic frequency components that are comparatively much smaller than the odd harmonic frequency components of the first amplifier's output signal. Signals are combined so that fundamental frequency components offset. Output signal at third harmonic of chrominance subcarrier frequency is used as clock signal for CCD comb filter in a color TV receiver.

REFERENCES:
patent: 3060364 (1962-10-01), Holcomb
patent: 3974460 (1976-08-01), Hongu et al.
patent: 4019118 (1977-04-01), Harwood
patent: 4224638 (1980-09-01), Pritchard et al.
patent: 4325076 (1982-04-01), Harwood et al.
Barker, R. W. J. and Reilly, E. P. J., "Odd-Order-Frequency-Multiple-Generation Technique", Electronic Letters, vol. 12, No. 7, (Apr. 1976), pp. 159-160.

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