Voltage follower circuit
AssigneeAblic Inc.
InventorKosuke Takada
Life of this patent
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Abstract
A voltage follower circuit includes a first MOS transistor which has a source connected to an input port, a second MOS transistor which has a source connected to an output port and has a gate and a drain connected to a gate of the first MOS transistor, a first constant current source connected between a drain of the first MOS transistor and a second power supply terminal, a second constant current source connected between the drain of the second MOS transistor and the second power supply terminal, and a depletion type third MOS transistor which has a gate connected to the drain of the first MOS transistor, has a drain connected to a first power supply terminal, and has a source connected to the output port.
Claims6
A voltage follower circuit, comprising:
- a first power supply terminal;
- a second power supply terminal;
- an input port;
- an output port;
- a first MOS transistor, having a source connected to the input port;
- a second MOS transistor, having a source connected to the output port and having a gate and a drain connected to a gate of the first MOS transistor;
- a first constant current source, connected between a drain of the first MOS transistor and the second power supply terminal;
- a second constant current source, connected between the drain of the second MOS transistor and the second power supply terminal;
- and
- a depletion type third MOS transistor, having a gate connected to the drain of the first MOS transistor, having a drain connected to the first power supply terminal, and having a source connected to the output port.
Dependencies are inferred from the claim text.