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US 9,287,832 B2Granted
Power amplifying module
AssigneeMurata Manufacturing Co., Ltd.
InventorsHiroshi Hagisawa, Satoshi Sakurai
Life of this patent
Estimating the term…
Abstract
A power amplifying module includes a radio frequency amplifying circuit including an amplifying circuit configured to amplify an input signal and output an amplified signal, and a bias circuit of an emitter-follower type configured to bias the amplifying circuit to an operating point, and a constant voltage generating circuit configured to generate, from a first reference voltage, a first constant voltage applied to a base side of a transistor of the bias circuit and a second constant voltage applied to a collector side of the transistor.
Claims28
A power amplifying module comprising:
- a radio frequency amplifying circuit including:
- an amplifying circuit configured to amplify an input signal and output an amplified signal;
- and
- a bias circuit of an emitter-follower type configured to bias the amplifying circuit to an operating point;
- and
- a constant voltage generating circuit configured to generate, from a first reference voltage, a first constant voltage applied to a base side of a transistor of the bias circuit and a second constant voltage applied to a collector side of the transistor;
- wherein
- the constant voltage generating circuit includes:
- a temperature characteristic compensating circuit configured to generate a second reference voltage from the first reference voltage, the second reference voltage changing according to a temperature characteristic of a diode connected to the base side of the transistor of the bias circuit;
- and
- a voltage generating circuit configured to generate the first and second constant voltages having levels corresponding to the second reference voltage.
8 more elements
A power amplifying module comprising:
- a radio frequency amplifying circuit including:
- an amplifying circuit configured to amplify an input signal and output an amplified signal;
- and
- a bias circuit of an emitter-follower type configured to bias the amplifying circuit to an operating point;
- and
- a constant voltage generating circuit configured to generate, from a first reference voltage, a first constant voltage applied to a base side of a transistor of the bias circuit and a second constant voltage applied to a collector side of the transistor;
- wherein
- the amplifying circuit includes:
- a first amplifying circuit configured to amplify the input signal and output the amplified signal;
- and
- a second amplifying circuit configured to amplify the signal output by the first amplifying circuit and output the amplified signal;
- and
- the bias circuit includes:
- a first bias circuit of an emitter-follower type configured to bias the first amplifying circuit to an operating point;
- and
- a second bias circuit of an emitter-follower type configured to bias the second amplifying circuit to an operating point;
- and
- the constant-voltage generating circuit includes:
- a first constant-voltage generating circuit configured to generate, from the first reference voltage, a first constant voltage applied to a base side of a transistor of the first bias circuit and a second constant voltage applied to a collector side of the transistor of the first bias circuit;
- and
- a second constant-voltage generating circuit configured to generate, from the first reference voltage, a third constant voltage applied to a base side of a transistor of the second bias circuit and a fourth constant voltage applied to a collector side of the transistor of the second bias circuit.
18 more elements
A power amplifying module comprising:
- a radio frequency amplifying circuit including:
- an amplifying circuit configured to amplify an input signal and output an amplified signal;
- and
- a bias circuit of an emitter-follower type configured to bias the amplifying circuit to an operating point;
- and
- a constant voltage generating circuit configured to generate, from a first reference voltage, a first constant voltage applied to a base side of a transistor of the bias circuit and a second constant voltage applied to a collector side of the transistor;
- wherein
- the radio frequency amplifying circuit includes:
- a first radio frequency amplifying circuit including a first amplifying circuit configured to amplify an input signal in a first frequency band and output the amplified signal, and a first bias circuit of an emitter-follower type configured to bias the first amplifying circuit to an operating point;
- and
- a second radio frequency amplifying circuit including a second amplifying circuit configured to amplify an input signal in a second frequency band and output the amplified signal, and a second bias circuit of an emitter-follower type configured to bias the second amplifying circuit to an operating point;
- the constant-voltage generating circuit includes:
- a first constant-voltage generating circuit configured to generate, from the first reference voltage, a first constant voltage applied to a base side of a transistor of the first bias circuit and a second constant voltage applied to a collector side of the transistor of the first bias circuit;
- and
- a second constant-voltage generating circuit configured to generate, from the first reference voltage, a third constant voltage applied to a base side of a transistor of the second bias circuit and a fourth constant voltage applied to a collector side of the transistor of the second bias circuit.
12 more elements
Dependencies are inferred from the claim text.