Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1989-12-27
1991-01-29
Miller, Stanley D.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307246, 307260, 328142, 341150, H03M 166, H03K 522, H03K 1756
Patent
active
049889001
ABSTRACT:
A generator capable of forming an analog signal having a waveform determined from a sequence of digital control words applied at a high frequency, each word representing an increment of the analog signal to be produced at the output. For this type of generator, the accuracy of the increment value is an essential parameter. If several increments having a different value are generated as a function of the control word, their ratio has to be very accurate. The diclosed circuit is of the switched-capacitor type; it comprises several input capacitors (C1, C2, C3) that are theoretically identical. In order to take into account the dispersion due to manufacturing, a procedure for choosing the best input capacitor is previously established for obtaining a precise ratio between the increments (+V, +3V, -V, -3V) that can be supplied at the output. This procedure consists in comparing capacitors by pairs to sequence them and select the median capacitor. Comparison is carried out by using the main amplifier of the switched-capacitor circuit.
REFERENCES:
patent: 4211981 (1980-07-01), Lerma
patent: 4438354 (1984-03-01), Haque et al.
patent: 4446438 (1984-05-01), Chang et al.
patent: 4578646 (1986-03-01), Maio et al.
patent: 4584568 (1986-04-01), Zomorrodi
patent: 4616185 (1984-06-01), Van Roermund
patent: 4617481 (1986-10-01), Masuda
patent: 4661802 (1987-04-01), Yukawa
patent: 4667179 (1987-05-01), Law et al.
patent: 4695804 (1985-07-01), Bardl et al.
patent: 4707624 (1987-11-01), Yee
patent: 4714843 (1987-12-01), Smith
patent: 4853698 (1989-08-01), Roessler
Cox, Douglas B., "A Digitally Programmable Switched-Capacitor Universal Active Filter/Oscillator, " IEEE Journal of Solid-State Circuits, vol. SC-18, No. 4, 1983, pp. 383-389.
Miller Stanley D.
SGS-Thomson Microelectronics S.A.
Tran Toan
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