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US 2026/0180531 A1Published application
Circuit having Multiple Cascode Amplifiers and Controllable Components
OwnerAshlesha Yerramsetty, Radhika Juluri +4inventors
InventorsAshlesha Yerramsetty, Radhika Juluri, Meghna Agrawal, Debapriya Sahu, Srinivas Veeramreddi, Prakhar Agrawal
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Abstract
A system includes a radio frequency (RF) receiver having a low noise trans-impedance amplifier (LNTA). The LNTA is configured to receive a single-ended RF voltage signal and convert the RF voltage signal to a differential current mode signal. The LNTA is configured for adjustable gain by controllable circuits.
Claims27
An electronic circuit comprising:
- first and second output terminals;
- an input terminal;
- a first cascode amplifier having first and second control terminals and first and second current path terminals, wherein the first control terminal of the first cascode amplifier is coupled to the input terminal, and wherein the second current path terminal of the first cascode amplifier is coupled to the first output terminal;
- a second cascode amplifier having first and second control terminals and first and second current path terminals, wherein the first control terminal of the second cascode amplifier is coupled to the first current path terminal of the first cascode amplifier via a first capacitor;
- a third cascode amplifier having first and second control terminals and first and second current path terminals, wherein the second current path terminal of the third cascode amplifier is coupled to the first output terminal, and wherein the second current path terminal of the third cascode amplifier is coupled to the second output terminal;
- a fourth cascode amplifier having first and second control terminals and first and second current path terminals, wherein the first control terminal of the fourth cascode amplifier is coupled to the first current path terminal of the third cascode amplifier via a second capacitor, and wherein the second current path terminal of the fourth cascode amplifier is coupled to the second output terminal;
- and
- a controllable circuit comprising:
- a set of first components, each first component having a first transistor arranged between the first current path terminal of the first cascode amplifier and the second current path terminal of the first cascode amplifier and a second transistor arranged between the first current path terminal of the third cascode amplifier and the second current path terminal of the third cascode amplifier, and
- a set of second components, each second component having a first transistor coupled to the first current path terminal of the first cascode amplifier, and a second transistor coupled to the first current path terminal of the third cascode amplifier.
7 more elements
An electronic circuit comprising:
- a first cascode amplifier having an output terminal;
- a second cascode amplifier having an output terminal,
- a third cascode amplifier having an output terminal, wherein the output terminal of the first cascode amplifier is coupled to the output terminal of the third cascode amplifier;
- a fourth cascode amplifier having an output terminal, wherein the output terminal of the fourth cascode amplifier is coupled to the output terminal of the second cascode amplifier;
- a first controllable circuit coupled to the first and third cascode amplifiers and configured to adjust a first amount of current at the output terminal of the first cascode amplifier;
- a second controllable circuit coupled to the second and fourth cascode amplifiers and configured to adjust a second amount of current at the output terminal of the second cascode amplifier;
- and
- a gain control circuit coupled to the first controllable circuit and to the second controllable circuit, the gain control circuit configured to adjust a gain at the output terminals of the first cascode amplifier, the second cascode amplifier, the third cascode amplifier, and the fourth cascode amplifier by applying control signals to the first controllable circuit and to the second controllable circuit.
5 more elements
A device comprising:
- a low noise trans-impedance amplifier (LNTA) including:
- a first cascode amplifier having an output terminal;
- a second cascode amplifier having an output terminal,
- a third cascode amplifier having an output terminal, wherein the output terminal of the first cascode amplifier is coupled to the output terminal of the third cascode amplifier;
- a fourth cascode amplifier having an output terminal, wherein the output terminal of the fourth cascode amplifier is coupled to the output terminal of the second cascode amplifier;
- a first controllable circuit coupled to the first and third cascode amplifiers and configured to adjust a first amount of current at the output terminal of the first cascode amplifier;
- and
- a second controllable circuit coupled to the second and fourth cascode amplifiers and configured to adjust a second amount of current at the output terminal of the second cascode amplifier;
- and
- a gain control circuit, coupled to the first controllable circuit and to the second controllable circuit, and configured to affect a gain of the LNTA by applying control signals to the first controllable circuit and to the second controllable circuit.
7 more elements
Dependencies are inferred from the claim text.