Reference voltage generation circuit
First Claim
1. A reference voltage generation circuit for generating reference voltages at a fixed voltage with respect to a varying voltage including a reference voltage generator generating a reference voltage which is constant with respect to a ground voltage, a voltage multiplication circuit for multiplying the reference voltage by a predetermined multiple to provide the fixed voltage, and an offset circuit for offsetting the fixed voltage by the varying voltage.
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Accused Products
Abstract
A circuit is provided for rectifying an AC input voltage to provide a substantially constant DC output voltage. A composite input voltage is derived from the AC input voltage, which is composed of a scaled input AC voltage shifted by a selected DC bias voltage such that the entire range of such input signal voltages is contained within the supply voltages of detection circuitry which controls the rectifier circuitry. The detection is thus carried out during both the upper and lower excursions of the input AC voltage.
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Citations
8 Claims
- 1. A reference voltage generation circuit for generating reference voltages at a fixed voltage with respect to a varying voltage including a reference voltage generator generating a reference voltage which is constant with respect to a ground voltage, a voltage multiplication circuit for multiplying the reference voltage by a predetermined multiple to provide the fixed voltage, and an offset circuit for offsetting the fixed voltage by the varying voltage.
- 6. A reference voltage generation circuit for generating reference voltages at a fixed value with respect to a varying voltage including a fixed reference current generator generating matching currents through two series portions of one circuit branch, at least one of said series portions including a resistive element, a node between the two series portions being connected to receive the varying voltage.
Specification