Back to results
US 12,301,186 B2Granted
Differential amplifier
AssigneeTaiwan Semiconductor Manufacturing Company, Ltd.
InventorsChin-Hao Chang, Manoj M. Mhala, Calvin Yi-Ping Chao
Life of this patent
Estimating the term…
Abstract
A differential amplifier is provided. The differential amplifier includes a first load, a second load, a current source, a differential pair circuit, a first and a second switch circuit. The differential pair circuit includes a first transistor, a second transistor, a third transistor, and a fourth transistor. The first switch circuit controls the first and the second transistors, and the second switch circuit controls the third and the fourth transistors. Through the control and selection of the first and second switch circuits, a differential pair is selected in the differential pair circuit to receive and process a first input signal and a second input signal for signal.
Claims20
A differential amplifier, comprising:
- a first load and a second load both connected to a first reference voltage;
- a current source connected to a second reference voltage;
- a differential pair circuit connected to the first load, the second load and the current source, wherein the differential pair circuit comprises:
- a first transistor having a first terminal coupled to the first load, a second terminal coupled to the current source and a control terminal;
- a second transistor having a first terminal coupled to the first load, a second terminal coupled to the current source and a control terminal;
- a third transistor having a first terminal coupled to the second load, a second terminal coupled to the current source and a control terminal;
- and
- a fourth transistor having a first terminal coupled to the second load, a second terminal coupled to the current source and a control terminal;
- a first switch circuit, coupled to the first transistor and the second transistor, wherein the first switch circuit is configured to select one of the first and second transistors according to a first control signal, and the selected one of the first and second transistors is enabled and provided with a first input signal for amplification;
- and
- a second switch circuit, coupled to the third transistor and the fourth transistor, wherein the second switch circuit is configured to select one of the third and fourth transistors according to a second control signal, and the selected one of the third and fourth transistors is enabled and provided with a second input signal for amplification,
- wherein the first control signal and the second control signal are configured to disable at least one of the transistors that causes a random telegraph noise.
9 more elements
A differential amplifier, comprising:
- a first load and a second load both connected to a first reference voltage;
- a current source connected to a second reference voltage;
- a differential pair circuit connected to the first load, the second load and the current source, wherein the differential pair circuit comprises:
- a first transistor having a first terminal coupled to the first load, a second terminal coupled to the current source and a control terminal receiving a first input signal;
- a second transistor having a first terminal coupled to the first load, a second terminal coupled to the current source and a control terminal receiving the first input signal;
- a third transistor having a first terminal coupled to the second load, a second terminal coupled to the current source and a control terminal receiving a second input signal;
- and
- a fourth transistor having a first terminal coupled to the second load, a second terminal coupled to the current source and a control terminal receiving the second input signal;
- a first switch circuit, coupled to the first transistor and the second transistor, wherein the first switch circuit is configured to select one of the first and second transistors according to a first control signal, and the selected one of the first and second transistors is enabled and coupled to the first load for amplification;
- and
- a second switch circuit, coupled to the third transistor and the fourth transistor, wherein the second switch circuit is configured to select one of the third and fourth transistors according to a second control signal, and the selected one of the third and fourth transistors is enabled and coupled to the second load for amplification,
- wherein the first control signal and the second control signal are configured to disable at least one of the transistors that causes a random telegraph noise.
9 more elements
A differential amplifier, comprising:
- a first load and a second load both connected to a first reference voltage;
- a differential pair circuit connected to the first load, the second load and a current source, wherein the differential pair circuit comprises:
- a first transistor having a first terminal coupled to the first load, a second terminal coupled to the current source and a control terminal;
- a second transistor having a first terminal coupled to the first load, a second terminal coupled to the current source and a control terminal;
- a third transistor having a first terminal coupled to the second load, a second terminal coupled to the current source and a control terminal;
- and
- a fourth transistor having a first terminal coupled to the second load, a second terminal coupled to the current source and a control terminal;
- a first switch circuit, coupled to the first transistor and the second transistor, wherein the first switch circuit is configured to select one of the first and second transistors according to a first control signal, and the selected one of the first and second transistors is enabled for amplification;
- and
- a second switch circuit, coupled to the third transistor and the fourth transistor, wherein the second switch circuit is configured to select one of the third and fourth transistors according to a second control signal, and the selected one of the third and fourth transistors is enabled for amplification,
- wherein the first control signal and the second control signal are configured to disable at least one of the transistors that causes a random telegraph noise.
8 more elements
Dependencies are inferred from the claim text.