Electricity: power supply or regulation systems – External or operator controlled – Using a three or more terminal semiconductive device as the...
Patent
1980-06-12
1981-10-13
Shoop, William M.
Electricity: power supply or regulation systems
External or operator controlled
Using a three or more terminal semiconductive device as the...
323313, 340347AD, H02J 100, H03K 1302
Patent
active
042950899
ABSTRACT:
Methods of and apparatus for generating precise reference voltages in a system utilizing a reference voltage V is disclosed including apparatus having a comparator, a voltage-to-current pulse converter having an input coupled to an output terminal of the comparator, a storage capacitor coupled across the output of the converter, and a point of reference potential, a buffer having an input coupled to the output of the converter, means for applying a reference voltage V to one terminal of a first capacitor while the second terminal of the first capacitor is coupled to a point of reference potential, means for decoupling the second terminal from the point of reference potential while the second terminal of the first capacitor remains coupled to an input terminal of a comparator, and means for applying the output of the buffer to a first terminal of the second capacitor wherein a second terminal of the second capacitor is coupled to the input terminal of the comparator. The first capacitor has capacitance value of (2.sup.2n-1 +...+2.sup.1 +2.sup.0) m farads. The second capacitor has value of (2.sup.2n-1 +...+2.sup.n) m farads. "n" is a positive integer, and "m" is a positive constant. In another embodiment, in lieu of the converter, storage capacitor, and buffer, a capacitive attenuator/memory and voltage divider is used. The output of the comparator is stored in the memory, and is applied to a voltage divider having an output coupled to the first terminal of the second capacitor.
REFERENCES:
patent: 4077035 (1978-02-01), Yee
patent: 4129863 (1978-12-01), Gray et al.
patent: 4195282 (1980-03-01), Cameron
patent: 4200863 (1980-04-01), Hodges et al.
Fisher Fred
GTE Laboratories Incorporated
Shoop William M.
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