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US 2014/0232435 A1Published application
Analog minimum or maximum voltage selector circuit
AssigneeAnalog Devices, Inc.
InventorsSandro HERRERA, Moshe GERSTENHABER
Life of this patent
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Abstract
A circuit includes multiple input sub-circuits coupled to a common output node. Each input sub-circuit includes a transconductance cell. A diode is coupled between the output of the transconductance cell and a common output node. A feedback circuit is coupled between the common output node and a second input of the transconductance cell. A voltage follower is coupled between the common output node and a reference voltage, with an input coupled to the output of the transconductance cell.
Claims20
A circuit system, comprising:
- a plurality of input sub-circuits coupled to the common output node, each input sub-circuit comprising:
- a transconductance cell having a first input for a respective input signal of a plurality of input signals and an output for an output current signal,
- a diode coupled between an output of the transconductance cell and the common output node,
- a feedback circuit coupled between the common output node and a second input of the transconductance cell, and
- a voltage follower having an output coupled to the common output node, an input coupled to the output of the transconductance cell and a common terminal coupled to a reference voltage.
2 more elements
A circuit system, comprising:
- at least two input sub-circuits coupled to the common output node, each input sub-circuit comprising:
- a transconductance cell having a first input for a respective input signal of a plurality of input signals and an output for an output current signal,
- a feedback circuit coupled between the common output node and a second input of the transconductance cell, and
- a voltage follower having an output coupled to the common output node, an input coupled to the output of the transconductance cell and a common terminal coupled to a reference voltage;
- and
- a plurality of diodes connected in parallel with each other and oppositely oriented relative to each other, coupling between outputs of the transconductance cells among each pair of input sub-circuits.
3 more elements
Dependencies are inferred from the claim text.