Amplifier, driving method for amplifier, and electronic circuit system

Patent metadata

Field	Value
Publication number	US-9543909-B2
Application number	US-201514633375-A
Country	US
Kind code	B2
Filing date	Feb 27, 2015
Priority date	Mar 14, 2014
Publication date	Jan 10, 2017
Grant date	Jan 10, 2017

Abstract

An amplifier includes a variable shunt circuit including a first transistor group and a second transistor group. The first transistor group includes at least one transistor including a first terminal connected directly or indirectly to a voltage-current conversion circuit, a second terminal connected directly or indirectly to a load, and a third terminal connected directly or indirectly to a control circuit. The second transistor group includes at least one transistor including a first terminal connected directly or indirectly to the voltage-current conversion circuit, a second terminal connected directly or indirectly to a power source or a ground, and a third terminal connected directly or indirectly to the control circuit. The amplifier is configured to amplify the input signal under exclusive control from the control circuit on a pair of the at least one transistor of the first transistor group and the at least one transistor of the second transistor group.

First claim

What is claimed is:

1. An amplifier, comprising a variable shunt circuit including
a first transistor group, and
a second transistor group provided correspondingly to the first transistor group,
the first transistor group including at least one transistor that includes
a first terminal connected directly or indirectly to a voltage-current conversion circuit configured to perform a voltage-current conversion of an input signal,
a second terminal connected directly or indirectly to a load, and
a third terminal connected directly or indirectly to a control circuit,

the second transistor group including at least one transistor that includes
a first terminal connected directly to the voltage-current conversion circuit,
a second terminal connected directly or indirectly to one of a power source and a ground, and
a third terminal connected directly or indirectly to the control circuit,

the amplifier being configured to amplify the input signal under exclusive control from the control circuit on a pair of the at least one transistor of the first transistor group and the at least one transistor of the second transistor group.

2. An amplifier, comprising a variable shunt circuit including
a first transistor group, and
a second transistor group provided correspondingly to the first transistor group,
the first transistor group including at least one transistor that includes
a first terminal connected directly or indirectly to a voltage-current conversion circuit configured to perform a voltage-current conversion of an input signal,
a second terminal connected directly or indirectly to a load, and
a third terminal connected directly or indirectly to a control circuit,

the second transistor group including at least one transistor that includes
a first terminal connected directly to the voltage-current conversion circuit,
a second terminal connected directly or indirectly to one of a power source and a ground, and
a third terminal connected directly or indirectly to the control circuit,

the at least one transistor of the first transistor group and the at least one transistor of the second transistor group each include a MOS transistor of one of an N-type and a P-type,
the first terminal of the at least one transistor of the first transistor group and the first terminal of the at least one transistor of the second transistor group each include a source,
the second terminal of the at least one transistor of the first transistor group and the second terminal of the at least one transistor of the second transistor group each include a drain,
the third terminal of the at least one transistor of the first transistor group and the third terminal of the at least one transistor of the second transistor group each include a gate, and
the amplifier being configured to amplify the input signal under exclusive control from the control circuit on a pair of the at least one transistor of the first transistor group and the at least one transistor of the second transistor group.

3. An amplifier, comprising variable shunt circuit including
a first transistor group, and
a second transistor group provided correspondingly to the first transistor group,
the first transistor group including at least one transistor that includes
a first terminal connected directly or indirectly to a voltage-current conversion circuit configured to perform a voltage-current conversion of an input signal,
a second terminal connected directly or indirectly to a load, and
a third terminal connected directly or indirectly to a control circuit,

the second transistor group including at least one transistor that includes
a first terminal connected directly to the voltage-current conversion circuit,
a second terminal connected directly or indirectly to one of a power source and a ground, and
a third terminal connected directly or indirectly to the control circuit,

the at least one transistor of the first transistor group and the at least one transistor of the second transistor group each include a bipolar transistor of one of an NPN-type and a PNP-type,
the first terminal of the at least one transistor of the first transistor group and the first terminal of the at least one transistor of the second transistor group each include an emitter,
the second terminal of the at least one transistor of the first transistor group and the second terminal of the at least one transistor of the second transistor group each include a collector, and
the third terminal of the at least one transistor of the first transistor group and the third terminal of the at least one transistor of the second transistor group each include a base, and
the amplifier being configured to amplify the input signal under exclusive control from the control circuit on a pair of the at least one transistor of the first transistor group and the at least one transistor of the second transistor group.

4. The amplifier according to claim 1 , wherein the amplifier is differentiated.

5. A driving method for an amplifier, the amplifier including a variable shunt circuit including
a first transistor group, and
a second transistor group provided correspondingly to the first transistor group,
the first transistor group including at least one transistor that includes
a first terminal connected directly or indirectly to a voltage-current conversion circuit configured to perform a voltage-current conversion of an input signal,
a second terminal connected directly or indirectly to a load, and
a third terminal connected directly or indirectly to a control circuit,

the second transistor group including at least one transistor that includes
a first terminal connected directly to the voltage-current conversion circuit,
a second terminal connected directly or indirectly to one of a power source and a ground, and
a third terminal connected directly or indirectly to the control circuit,

the driving method for the amplifier comprising:
causing the amplifier to amplify the input signal under exclusive control from the control circuit on a pair of the at least one transistor of the first transistor group and the at least one transistor of the second transistor group.

6. An amplifier, comprising a variable voltage-current conversion circuit including
a first transistor group configured to perform a voltage-current conversion, and
a second transistor group provided correspondingly to the first transistor group and configured to perform a voltage-current conversion,
the first transistor group including at least one transistor that includes
a first terminal connected directly or indirectly to a first switching element that is controlled by a control circuit,
a second terminal connected directly or indirectly to a load, and
a third terminal connected directly or indirectly to an input terminal to which an input signal is input,

the second transistor group including at least one transistor that includes
a first terminal connected directly to a second switching element that is controlled by the control circuit,
a second terminal connected directly or indirectly to one of a power source and a ground, and
a third terminal connected directly or indirectly to the input terminal,

wherein the at least one transistor of the first transistor group and the at least one transistor of the second transistor group each include a MOS transistor of one of an N-type and a P-type,
the first terminal of the at least one transistor of the first transistor group and the first terminal of the at least one transistor of the second transistor group each include a source,
the second terminal of the at least one transistor of the first transistor group and the second terminal of the at least one transistor of the second transistor group each include a d

Assignees

• Sony Corp

Inventors

• Takahashi Katsuaki

Classifications

• H03F3/72

  Gated amplifiers, i.e. amplifiers which are rendered operative or inoperative by means of a control signal · CPC title

• H03F3/211

  using a combination of several amplifiers (H03F3/60 takes precedence) · CPC title

• H03F3/19 Primary

  with semiconductor devices only · CPC title

• H03F2203/45024

  the differential amplifier amplifying transistors are cascode coupled transistors · CPC title

• H03G3/3068

  Circuits generating control signals for both R.F. and I.F. stages · CPC title