Common mode bias generator
First Claim
1. A potential generator for generating a predetermined potential, the generator comprising:
- a first operational amplifier with a non-inverting input terminal, an inverting input terminal and an output node, where a first reference potential is applied to the non-inverting input terminal of the first amplifier and a potential at the output node of the first amplifier is not only applied to the inverting input terminal of the first amplifier but also used as the output of the generator;
a current supply circuit for supplying a current to the output node of the first amplifier if the potential at the output node of the first amplifier is lower than a predefined level; and
a current sink circuit for draining a current from the output node of the first amplifier if the potential at the output node of the first amplifier is higher than the predefined level.
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Accused Products
Abstract
An inventive potential generator generates a predetermined potential and includes first operational amplifier, current supply circuit and current sink circuit. A first reference potential is applied to the non-inverting input terminal of the first amplifier and a potential at the output node of the first amplifier is not only applied to the inverting input terminal of the first amplifier but also used as the output of the generator. The current supply circuit supplies a current to the output node of the first amplifier if the potential at the output node of the first amplifier is lower than a predefined level. And the current sink circuit drains a current from the output node of the first amplifier if the potential at the output node of the first amplifier is higher than the predefined level.
76 Citations
13 Claims
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1. A potential generator for generating a predetermined potential, the generator comprising:
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a first operational amplifier with a non-inverting input terminal, an inverting input terminal and an output node, where a first reference potential is applied to the non-inverting input terminal of the first amplifier and a potential at the output node of the first amplifier is not only applied to the inverting input terminal of the first amplifier but also used as the output of the generator;
a current supply circuit for supplying a current to the output node of the first amplifier if the potential at the output node of the first amplifier is lower than a predefined level; and
a current sink circuit for draining a current from the output node of the first amplifier if the potential at the output node of the first amplifier is higher than the predefined level. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification