Amplifying circuit
AssigneeSTMicroelectronics (Shenzhen) R&D Co. Ltd
InventorHong Wu Lin
Life of this patent
Estimating the term…
Abstract
A circuit includes a first circuit module with a first input node, a second input node and an output node. The first circuit module receives an input signal at the first input node and generates an amplified signal at the output node. The circuit further includes a second circuit module coupled between the output node and a reference potential line. The second circuit selectively draws a current from the output node in response to a first control signal. The first control signal is generated in response to sensing a voltage fluctuation at a power supply node which supplies power to the first circuit module.
Claims16
A circuit, comprising:
- a first circuit module with a first input node, a second input node and an output node, wherein the first circuit module is configured to receive an input signal at the first input node and generate an amplified signal at the output node;
- and
- a second circuit module coupled between the output node and a reference potential line, configured to draw a current from the output node in response to a first control signal;
- wherein the second circuit module comprises a first MOS transistor of a first conductive type, a gate of the first MOS transistor being coupled to receive the first control signal;
- and
- wherein the second circuit module further comprises a second MOS transistor of a second conductive type, coupled in series with the first MOS transistor, a gate of the second MOS transistor being coupled to receive an inverted signal of the first control signal.
A circuit, comprising:
- a first circuit module with a first input node, a second input node and an output node, wherein the first circuit module is configured to receive an input signal at the first input node and generate an amplified signal at the output node;
- and
- a second circuit module coupled between the output node and a reference potential line, configured to draw a current from the output node in response to a first control signal;
- wherein the first circuit module further comprises a switch coupled between the first input node and the second input node, and wherein the switch is configured to operate in response to a second control signal.
A circuit, comprising:
- a first circuit module with a first input node, a second input node and an output node, wherein the first circuit module is configured to receive an input signal at the first input node and generate an amplified signal at the output node;
- a second circuit module coupled between the output node and a reference potential line, configured to draw a current from the output node in response to a first control signal;
- a controller;
- and
- a coupler configured to couple the output node of the first circuit module to the reference potential line in response to an output of the controller.
A circuit, comprising:
- a first differential amplifier having differential inputs and an output configured to be coupled to a load;
- a bypass circuit coupled between the output of the first differential amplifier and a reference supply node;
- and
- a sensing circuit configured to sense a voltage fluctuation at a power supply node and in response thereto actuate the bypass circuit to shunt the output of the first differential amplifier to the reference supply node.
Dependencies are inferred from the claim text.