Patent classifications
H
ELECTRICITY
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H03
ELECTRONIC CIRCUITRY
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H03F
AMPLIFIERS
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3/00
Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
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H03F3/45071
with semiconductor devices only
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H03F3/45479
characterised by the way of common mode signal rejection
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H03F3/45484
in differential amplifiers with bipolar transistors as the active amplifying circuit
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H03F3/45515
Measuring at the active amplifying circuit of the differential amplifier
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H03F3/45515

Fully differential operational amplifier common mode current sensing feedback
10897234 · 2021-01-19 · ·

A method and apparatus for sensing a common mode feedback current are provided. The common mode feedback current may flow through a common mode resistive divider of a piezoresistive bridge. A first current mirror mirrors the common mode feedback current and provides a first mirrored common mode current. A current aggregation stage receives the first mirrored common mode current and determines a bridge current of the piezoresistive bridge based on the first mirrored common mode feedback current. A second current mirror may be used to mirror the first current mirror before determining the bridge current.

FULLY DIFFERENTIAL OPERATIONAL AMPLIFIER COMMON MODE CURRENT SENSING FEEDBACK
20200304085 · 2020-09-24 ·

A method and apparatus for sensing a common mode feedback current are provided. The common mode feedback current may flow through a common mode resistive divider of a piezoresistive bridge. A first current mirror mirrors the common mode feedback current and provides a first mirrored common mode current. A current aggregation stage receives the first mirrored common mode current and determines a bridge current of the piezoresistive bridge based on the first mirrored common mode feedback current. A second current mirror may be used to mirror the first current mirror before determining the bridge current.