Wave transmission lines and networks – Automatically controlled systems – With control of equalizer and/or delay network
Patent
1974-11-13
1976-12-21
Smith, Alfred E.
Wave transmission lines and networks
Automatically controlled systems
With control of equalizer and/or delay network
307221D, 307304, 333 70A, 357 24, H03H 710, H03H 712, H03H 728, H01L 2978
Patent
active
039979733
ABSTRACT:
A charge-transfer transversal filter and method of use is provided. In one aspect of the invention a handpass filter is provided where the center frequency of the bandpass is variable responsive to the clock rate applied to the charge-transfer devices. In a different aspect of the invention a matched filter for a chirp signal is provided. The filter requires a minimum number of Nyquist samples by including the provision of a clock rate which varies responsive to the frequency sweep of the input chirp signal. A method for detecting a chirp signal is provided which includes the step of selectively varying the clock rate applied to a charge-transfer shift register responsive to the frequency variations of a selected chirp signal.
REFERENCES:
patent: 3474260 (1969-10-01), Frobach
patent: 3543009 (1970-11-01), Voelcker, Jr.
patent: 3622916 (1971-11-01), Fjallibrant
patent: 3668438 (1972-06-01), Chesney et al.
patent: 3809923 (1974-05-01), Esser
Sangster, "The Bucket Brigade Delay Line, a Shift Register for Analogue Signal;" Phillips Technical Review, vol. 31, 1970, No. 4, pp. 97-110.
Smith et al., Active Band Pass Filtering with Bucket-Brigade Delay Lines in IEE Journal of Solid-State Circuits, vol. SC-7, Oct. 1972; pp. 421-425.
Comfort James T.
Donaldson Richard L.
Levine Harold
Nussbaum Marvin
Smith Alfred E.
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