Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1980-05-27
1981-08-18
Munson, Gene M.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
357 24, 333165, G11C 1928, H01L 2978, H03H 1502
Patent
active
042849080
ABSTRACT:
A filter is described utilizing charge transfer devices for providing exponential smoothing of sampled data signals with a transmission zero at a predetermined frequency. A first shift register is provided having N serially coupled stages to each of which is coupled a respective accumulator stage. A second shift register is provided having N serially coupled stages. A sequence of packets of charge is provided, each packet representing a respective sample of an input signal. Each packet of the sequence is divided into a first part and a second part, the ratio of the first part to the second part being equal to a first fixed value. Each of the first parts of the packets of the sequence is applied to the first shift register and is sequentially processed in successive stages thereof to provide an output. Each of the second parts of the packets of the sequence is applied to the second shift register and transferred from stage to stage to provide another output. The frequency response of each of the stages of the first shift register with associated accumulator stage decreases with increase in frequency of the input signal, and the shift in phase of the frequency response increases with increase in frequency of the input signal. Each stage of the first shift register is set to provide a phase shift at a predetermined angular frequency .omega..sub.z which is equal to .omega. radians divided by N, the number of stages in the first shift registers. The aforementioned first fixed value is set so that the amplitude of the frequency response of the cascaded stages of the first shift register at the predetermined frequency .omega..sub.z is equal to the amplitude of the frequency response of second shift register at the frequency .omega..sub.z. The outputs of the first and second shift registers are combined thereby providing a resultant output in which the signal component of the frequency .omega..sub.z is zero.
REFERENCES:
patent: 4124861 (1978-11-01), Baertsch et al.
patent: 4124862 (1978-11-01), Engeler et al.
patent: 4172983 (1979-10-01), MacLennan
Davis Jr. James C.
General Electric Company
Munson Gene M.
Snyder Marvin
Zaskalicky Julius J.
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