US 2022/0045652 A1Published application

Amplifying apparatus

AssigneeRichWave Technology Corp.

InventorTing-Yuan Cheng

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Abstract

An amplifying apparatus includes a zero point generating circuit, a level shift circuit, a transistor, and an amplifying circuit. A first terminal of the zero point generating circuit is coupled to an output terminal of the amplifying apparatus. A first terminal of the level shift circuit is coupled to the output terminal of the amplifying apparatus. A first terminal of the transistor is coupled to a supply voltage. A second terminal of the transistor is coupled to the output terminal of the amplifying apparatus. A control terminal of the transistor is coupled to a second terminal of the level shift circuit. An input terminal of the amplifying circuit is coupled to an input terminal of the amplifying apparatus. An output terminal of the amplifying circuit is coupled to the output terminal of the amplifying apparatus.

Claims10

Dependent claims

An amplifying apparatus, comprising:

a zero point generating circuit, having a first terminal coupled to a first output terminal of the amplifying apparatus;
a first level shift circuit, having a first terminal directly coupled to the first output terminal of the amplifying apparatus;
a first transistor, having a first terminal coupled to a first supply voltage, wherein a second terminal of the first transistor is coupled to the first output terminal of the amplifying apparatus, and a control terminal of the first transistor is coupled to a second terminal of the first level shift circuit;
a first amplifying circuit, having an input terminal coupled to a first input terminal of the amplifying apparatus, wherein an output terminal of the first amplifying circuit is coupled to the first output terminal of the amplifying apparatus,
wherein the zero point generating circuit comprises:
a capacitive circuit, having a first terminal coupled to a second terminal of the zero point generating circuit, wherein a second terminal of the capacitive circuit is coupled to a third terminal of the zero point generating circuit;
and
a resistive circuit, having a first terminal coupled to the first terminal of the zero point generating circuit, wherein a second terminal of the resistive circuit is coupled to the third terminal of the zero point generating circuit;
and
a second transistor, having a first terminal coupled to a second supply voltage, wherein a second terminal of the second transistor is coupled to the third terminal of the zero point generating circuit to provide a first bias voltage, the third terminal of the zero point generating circuit is coupled to a connection node between the resistive circuit and the capacitive circuit, and a control terminal of the second transistor is coupled to the second terminal of the first level shift circuit.

7 more elements

An amplifying apparatus, comprising:

a zero point generating circuit, having a first terminal coupled to a first output terminal of the amplifying apparatus;
a first level shift circuit, having a first terminal coupled to the first output terminal of the amplifying apparatus;
a first transistor, having a first terminal coupled to a first supply voltage, wherein a second terminal of the first transistor is coupled to the first output terminal of the amplifying apparatus, and a control terminal of the first transistor is coupled to a second terminal of the first level shift circuit;
a first amplifying circuit, having an input terminal coupled to a first input terminal of the amplifying apparatus, wherein an output terminal of the first amplifying circuit is coupled to the first output terminal of the amplifying apparatus;
a second transistor, having a first terminal coupled to a second output terminal of the amplifying apparatus, wherein a second terminal of the zero point generating circuit is coupled to a second supply voltage or the second terminal of the first level shift circuit, and a third terminal of the zero point generating circuit is coupled to a second terminal and a control terminal of the second transistor, wherein the second terminal of the second transistor and the control terminal of the second transistor are coupled together;
a second level shift circuit, having a first terminal coupled to the second output terminal of the amplifying apparatus;
an third transistor, having a first terminal coupled to a third supply voltage, wherein a second terminal of the third transistor is coupled to the second output terminal of the amplifying apparatus, and a control terminal of the third transistor is coupled to a second terminal of the second level shift circuit;
and
a second amplifying circuit, having an input terminal coupled to a second input terminal of the amplifying apparatus, wherein an output terminal of the second amplifying circuit is coupled to the second output terminal of the amplifying apparatus, wherein the control terminal of the second transistor receives a first bias voltage.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/505,638Filed 20 Oct 2021
Priority: TW 10814223321 Nov 2019
Published: 10 Feb 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

H03F 3/04
Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements: with semiconductor devices only
H03F 3/45179
Characterised by the way of implementation of the active amplifying circuit in the differential amplifier: using MOSFET transistors as the active…
H03F 3/45183
Using MOSFET transistors as the active amplifying circuit: long tailed pairs
H03K 19/017509
Coupling arrangements; Interface arrangements: interface arrangements

Family

Application17/027,728Division · filed 22 Sep 2020
Application17/505,638Division
US 11,196,393 B2Related patent
US 11,476,812 B2Related patent
US 2021/0159859 A1Published application
US 2022/0045652 A1This patent

From the US filing history. Foreign family members aren’t listed.

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