Differentiation and integration utilizing charge-coupled devices

Details Differentiation and integration utilizing charge-coupled devices Differentiation and integration utilizing charge-coupled devices

1981-10-26

1986-12-02

Munson, Gene M.

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

Charge transfer device

Particular input or output means

377 59, 357 24, G11C 1928, H01L 2978

Patent

active

046270841

ABSTRACT:
A charge-coupled-device analog input circuit, for generating packets of electrical charge representative of samples of a differentiated analog input signal, and a charge-coupled-device analog output circuit, for generating an analog output signal by a process of integration of the signal values represented by the charge packets. The differentiating input circuit includes a signal input circuit with a relatively large input capacitance, and a separate bias input circuit with a relatively small input capacitance, to generate charge packets at a selected bias level. The integrating output circuit includes a set of bias gates for removing from each packet an amount of charge equal to the bias charge generated at the input circuit, and also includes a feedback loop for adding to each charge packet presented at the output circuit a charge equivalent to the cumulative sum of all signal samples derived by the circuit. The differentiating and integrating circuits can be used in a variety of applications, and provide exceptionally low noise characteristics.

REFERENCES:
patent: 3876952 (1975-04-01), Weimer
patent: 4035667 (1977-07-01), Heller
patent: 4071775 (1978-01-01), Hewes
patent: 4210825 (1980-07-01), Crochiere et al.
patent: 4501007 (1985-02-01), Jensen
Tompsett "Charge Transfer Devices", J. Vac. Sci. Technol., vol. 9 (7-8/72) pp. 1166-1181.
Sequin et al, "A Symmetrically Balanced Linear Differential Charge-Splitting Input for Charge-Coupled Devices", IEEE Trans. Electron Devices, vol. ED-24 (6/77) pp. 746-750.

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