Signal processing device having frequency-adaptive sampling

Details Signal processing device having frequency-adaptive sampling Signal processing device having frequency-adaptive sampling

1992-10-14

1994-03-29

Wambach, Margaret R.

Electrical pulse counters, pulse dividers, or shift registers: c

Charge transfer device

Particular input or output means

377 62, 257254, 257416, G11C 1928, H03K 2108

Patent

active

052992470

ABSTRACT:
The invention provides a signal processing device including sampling means (31, 41, 32) for sampling an input signal in the form of charge carrier packages and a shift register (4) having an input region (41) to which a signal sample is offered during operation, and provided with transport means (2) for transporting the signal sample to an output region (42) of the shift register. The device according to the invention is capable of adapting itself to the frequency with which the input signal is sampled in such a way that the storage of the increase in signal samples which accompanies an increase in the sampling frequency does not require additional space. For this purpose, according to the invention, the shift register comprises a transport channel (4) in which an electron-hole liquid can exist. The sampling means (31, 41, 32) are capable of sampling the input signal in the form of electron-hole droplets (71 . . . 74) which are transported through the shift register by means of an acoustic wave generated by the transport means.

REFERENCES:
"Acoustic wave amplifier having a coupled semiconductor Layer", Farg et al., IBM Tech. Disc. Bull. vol. 13 No. 11 Apr. 1971 p. 3487.
"PT Elektronica-Elektrotechniek" No. 4, Apr. 1990, pp. 38-39.
J. Vac. Sci., Technol. B6(2), Mar./Apr. 1988, pp. 685-687.
"Surface Excitations" by V. M. Agranovich & R. Loudon (1984) p. 249.

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