Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1975-04-18
1976-11-02
Larkins, William D.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307225C, 307304, 357 24, H01L 2710, H03K 2502, H03K 2330
Patent
active
039899560
ABSTRACT:
A two-phase charge transfer binary counter capable of counting the number of signal pulses in a particular time interval is described. The counter includes a charge storage medium in which is formed at least one charge storage "Q-cell" adapted to quantize each signal pulse into a charge packet. In tandem with the Q-cells are a plurality of one-bit shift registers each of which, except the last, comprises first and second charge storage cells connected in series. Adjacent cells of the same shift register are separated from one another by a threshold potential barrier of magnitude V.sub.T which permits only partial charge transfer thereacross. In contrast, adjacent cells of consecutive shift registers are separated from one another by a smaller transfer potential barrier of magnitude V.sub.B which permits virtually complete charge transfer thereacross. A feedback path is established between adjacent cells of the same shift register in order to clear residual charge from the first cell in response to charge transferred over its threshold barrier. At the end of the time interval, however, charge transfer ceases and the charge packets residing in the first cell of each shift register are the binary equivalent to the number of signal pulses in the time interval.
REFERENCES:
patent: 3777186 (1973-12-01), Chang
Mok et al., Electronics Letters, vol. 8, No. 20, Oct. 5, 1972, pp. 495-496.
Hibberd, Integrated Circuits, (TI Electronics Series, McGraw-Hill, NY, 1969) pp. 114-117.
Bell Telephone Laboratories Incorporated
Larkins William D.
Urbano Michael J.
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