Roll-off filter apparatus

Details Roll-off filter apparatus Roll-off filter apparatus

1992-06-05

1994-03-22

Nguyen, Long T.

Boots, shoes, and leggings

G06G 702

Patent

active

052970744

ABSTRACT:
Disclosed is a roll-off filter apparatus having a small size, a simplified circuit structure and consuming a small amount of power. In the roll-off filter apparatus attaining the above object of the invention, a ramp signal generated from a ramp pattern generator is inserted in each gap of a data input signal temporarily stored in a buffer circuit, and such a signal is filtered in a switched capacitor filter having a roll-off filter characteristic. The output signal of the switched capacitor filter is supplied to be temporarily stored in a bucket brigade device, and the output signal of the bucket brigade device is delivered at a desired signal rate.

REFERENCES:
patent: 3935536 (1976-01-01), Kimura et al.
patent: 4110835 (1978-08-01), Dubil et al.
Douverne, E. et al., "Modulator und Demodulator", Nachrichtentechnische Berichte, No. 2, Dec. 1985, pp. 15-22.
Cavers, J. K., et al., "A Simple Buffer Control for Variable-Rate Communication Systems", IEEE Transactions On Communication, vol. 24, No. 9, Sep. 1976, pp. 1045-1048.

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