Low noise amplifier
OwnerCho-Chun Huanginventor
Life of this patent
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Abstract
The present invention provides a low noise amplifier, comprising a first active element having a first terminal, a second terminal and a third terminal, in which the first terminal is connected to an input terminal; a second active element having a first terminal, a second terminal and a third terminal, wherein the first terminal is connected to another input terminal; a first adjustable attenuation device which has a first terminal connected to the first terminal of the first active element and a second terminal connected to the second terminal of the second active element; and a second adjustable attenuation device which has a first terminal connected to the second terminal of the first active element and a second terminal connected to the first terminal of the second active element.
Claims26
A low noise amplifier, comprising:
- a first active element having a first terminal, a second terminal and a third terminal, wherein the first terminal is connected to an input terminal;
- a second active element having a first terminal, a second terminal and a third terminal, wherein the first terminal is connected to another input terminal;
- a first adjustable attenuation device which has a first terminal connected to the first terminal of the first active element and a second terminal connected to the second terminal of the second active element;
- and
- a second adjustable attenuation device which has a first terminal connected to the second terminal of the first active element and a second terminal connected to the first terminal of the second active element.
A tuner comprising at least a filter, a low noise amplifier, a mixer, a local oscillator and a frequency selector, characterized in that:
- the low noise amplifier comprises:
- a first active element having a first terminal, a second terminal and a third terminal, wherein the first terminal is connected to an input terminal;
- a second active element having a first terminal, a second terminal and a third terminal, wherein the first terminal is connected to another input terminal;
- a first adjustable attenuation device which has a first terminal connected to the first terminal of the first active element and a second terminal connected to the second terminal of the second active element;
- and
- a second adjustable attenuation device which has a first terminal connected to the second terminal of the first active element and a second terminal connected to the first terminal of the second active element.
A tuner comprising at least a low noise amplifier, a first mixer, a first local oscillator, a filter, a second mixer, a second local oscillator and a frequency selector, characterized in that:
- the low noise amplifier comprises:
- a first active element having a first terminal, a second terminal and a third terminal, wherein the first terminal is connected to an input terminal;
- a second active element having a first terminal, a second terminal and a third terminal, wherein the first terminal is connected to another input terminal;
- a first adjustable attenuation device which has a first terminal connected to the first terminal of the first active element and a second terminal connected to the second terminal of the second active element;
- and
- a second adjustable attenuation device which has a first terminal connected to the second terminal of the first active element and a second terminal connected to the first terminal of the second active element.
A tuner comprising at least a low noise amplifier, a first multi-phase filter, a dual quadrature mixer, a quadrature oscillator, a second multi-phase filter and a frequency selector, characterized in that:
- the low noise amplifier comprises:
- a first active element having a first terminal, a second terminal and a third terminal, wherein the first terminal is connected to an input terminal;
- a second active element having a first terminal, a second terminal and a third terminal, wherein the first terminal is connected to another input terminal;
- a first adjustable attenuation device which has a first terminal connected to the first terminal of the first active element and a second terminal connected to the second terminal of the second active element;
- and
- a second adjustable attenuation device which has a first terminal connected to the second terminal of the first active element and a second terminal connected to the first terminal of the second active element.
A tuner comprising at least a low noise amplifier, a quadrature mixer, a first quadrature oscillator, a dual quadrature mixer, a second quadrature oscillator, a multi-phase filter and a frequency selector, characterized in that:
- the low noise amplifier comprises:
- a first active element having a first terminal, a second terminal and a third terminal, wherein the first terminal is connected to an input terminal;
- a second active element having a first terminal, a second terminal and a third terminal, wherein the first terminal is connected to another input terminal;
- a first adjustable attenuation device which has a first terminal connected to the first terminal of the first active element and a second terminal connected to the second terminal of the second active element;
- and
- a second adjustable attenuation device which has a first terminal connected to the second terminal of the first active element and a second terminal connected to the first terminal of the second active element.
Dependencies are inferred from the claim text.