Charge comparator

Details Charge comparator Charge comparator

1976-12-20

1978-05-30

Zazworsky, John

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307360, 307362, 357 24, H03K 500

Patent

active

040925498

ABSTRACT:
The charge comparator, in accordance with the inventon, illustrated as a p-channel device utilizes charge-transfer devices (CTD) that provide positive feedback to a preceding storage well so that when a small charge is transferred over a charge barrier and then under a floating electrode, the resultant voltage increase on the floating electrode is fed back in a positive sense and effectively raises the bottom of the preceding storage well. This action quickly results in a larger charge transfer over the charge barrier into the well under the floating electrode and the system becomes regenerative. Thus, the entire preceding storage well charge is transferred over the barrier into the potential well beneath the floating electrode and a digital 1 is created. If this regenerative operation is not triggered, as a result of the input signal not reaching a reference level, a digital zero output is provided. The comparator first establishes a reference level in the preceding storage well by setting the charge barrier to a reference level while the floating electrode is clamped. The input signal is then applied to the electrode associated with the charge barrier and the floating electrode is unclamped. The level of the input signal determines whether charge flows over the barrier and thus under the floating electrode to develop a digital 1 output.

REFERENCES:
patent: 3838438 (1974-09-01), Silversmith et al.
patent: 3858232 (1974-12-01), Boyle et al.

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