Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Patent
1979-09-27
1982-09-28
Sloyan, Thomas J.
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
455186, 455183, H03J 500
Patent
active
043522041
ABSTRACT:
The reference signal output from a reference oscillator is applied to a counter where the reference signal is counted to provide a count output as a changeable digital value. A saw-tooth wave generator is provided so as to generate a saw-tooth wave such that the saw-tooth wave is changeable of the waveform in synchronism with the count output. A comparison voltage generator is also provided which may typically comprise a variable resistor. A load enable signal generator is provided to receive the saw-tooth wave output from the saw-tooth wave generator and the comparison voltage output as set in the comparison voltage generator. The load enable signal generator is structured to compare the saw-tooth wave output and the comparison voltage output to provide a load enable signal whenever both outputs coincide with each other. A digital memory is provided to be responsive to the load enable signal from the load enable signal generator to load therein the count output representing a digital value in the counter which has been attained when the load enable signal is obtained.
REFERENCES:
patent: 3588545 (1971-06-01), Wright
patent: 3654560 (1972-04-01), Cath et al.
patent: 3808407 (1972-04-01), Ratz
patent: 3984829 (1976-10-01), Zwack
patent: 3990027 (1976-11-01), Kawashima
patent: 4023108 (1977-05-01), Torii
patent: 4110694 (1978-08-01), Wilhelm
The Engineering Staff of Analog Device, Inc., Analog-Digital Conversion Handbook, 6/1972, pp. I-33 & 34.
Schmid, Electronic Analog/Digital Conversions, Van Nostrand Reinhold Co., 1970, pp. 274-279.
Hnatek, A User's Handbook of D/A and A/D Converters, John Wiley & Sons, 1976, pp. 246-251.
McCrady, Patent Office Practice, Margit Publications, 1962, pp. 52-57.
Ohgishi Tsutomu
Sakurai Tadashi
Sanyo Electric Co,. Ltd.
Sloyan Thomas J.
LandOfFree
Entry apparatus of digital value in memory does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Entry apparatus of digital value in memory, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Entry apparatus of digital value in memory will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-402849