Fully differential amplifier including feedforward path
AssigneeSamsung Electronics Co., Ltd.
InventorsJisoo Chang, Wonjun Jung, Byeongwan Ha
Life of this patent
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Abstract
A fully differential amplifier includes: an input stage comprising a first amplification circuit and a second amplification circuit, one of which is configured to generate a push signal and the other of which is configured to generate a pull signal, each by amplifying a differential input signal; an output stage for generating a differential output signal based on the push signal and the pull signal; and a feedback circuit for providing common mode feedback to the first amplification circuit based on the differential output signal, wherein the second amplification circuit may include a passive network for setting a common mode voltage of the push signal or the pull signal.
Claims20
A fully differential amplifier comprising:
- an input stage comprising a first amplification circuit and a second amplification circuit, one of which is configured to generate a push signal and the other of which is configured to generate a pull signal, each by amplifying a differential input signal;
- an output stage configured to generate a differential output signal based on the push signal and the pull signal;
- and
- a feedback circuit configured to provide common mode feedback to the first amplification circuit based on the differential output signal,
- wherein the second amplification circuit comprises a passive network for setting a common mode voltage of the push signal or the pull signal.
A fully differential amplifier comprising:
- an input stage configured to generate a first amplified signal and a second amplified signal from a differential input signal;
- and
- an output stage configured to generate a differential output signal based on a push-pull operation according to the first amplified signal and the second amplified signal,
- wherein the input stage comprises:
- a first amplification circuit configured to generate the first amplified signal based on common mode feedback generated from the differential output signal;
- and
- a second amplification circuit configured to generate the second amplified signal having a common mode voltage which is set based on a bias and a passive network.
A fully differential amplifier comprising:
- an input stage comprising a first amplification circuit and a second amplification circuit configured to respectively generate a first amplified signal and a second amplified signal from a differential input signal;
- and
- an output stage configured to generate a differential output signal based on a push-pull operation according to the first amplified signal and the second amplified signal,
- wherein the first amplification circuit is configured to generate the first amplified signal based on common mode feedback generated from the differential output signal, and
- the second amplification circuit comprises a first resistor and a second resistor connected in series with each other between differential output nodes of the second amplified signal, and configured to provide a bias voltage for a common mode voltage of the second amplified signal.
Dependencies are inferred from the claim text.