US 2010/0060363 A1 · WIDEBAND LOW-NOISE AMPLIFIER

Abstract

A wideband low-noise amplifier includes a source-degenerated common-source amplifier, a common-gate amplifier, and a matching frequency band determiner. The source-degenerated common-source amplifier is configured to amplify an input signal to output a first signal that is opposite in phase to the input signal. The common-gate amplifier is connected in parallel to the source-degenerated common-source amplifier to amplify the input signal to output a second signal that has the same phase as the input signal. The matching frequency band determiner is configured to isolate an input terminal of the source-degenerated common-source amplifier and an input terminal of the common-gate amplifier and determine a matching frequency band.

Claims14

Dependent claims

A wideband low-noise amplifier comprising:

a source-degenerated common-source amplifier amplifying an input signal to output a first signal that is opposite in phase to the input signal;
a common-gate amplifier connected in parallel to the source-degenerated common-source amplifier to amplify the input signal to output a second signal that has the same phase as the input signal;
and
a matching frequency band determiner isolating an input terminal of the source-degenerated common-source amplifier and an input terminal of the common-gate amplifier and determine a matching frequency band.

1 more element

A wideband low-noise amplifier comprising:

an input unit generating two differential signals by using an input signal, the input unit comprising:
a source-degenerated common-source amplifier;
a common-gate amplifier connected in parallel to the source-degenerated common-source amplifier;
and
a matching frequency band determiner isolating an input terminal of the source-degenerated common-source amplifier and an input terminal of the common-gate amplifier and determine a matching frequency band;
a current buffer increasing a reverse isolation, the current buffer comprising transistors that are respectively connected in cascade to the source-degenerated common-source amplifier and the common-gate amplifier;
and
an output load extending the frequency bandwidth of the first signal and the frequency bandwidth of the second signal and to even a power gain.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application

12/423,764Filed 14 Apr 2009

Priority

KR 10-2008-00879045 Sep 2008

Published

11 Mar 2010

Term ends

Not estimatedThe source records don’t support an estimate.

Classification8 codes

H03F 1/26
Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements: modifications of…
H03F 1/565
Modifications of input or output impedances, not otherwise provided for: using inductive elements
H03F 3/195
With semiconductor devices only: in integrated circuits
H03F 2200/222
Indexing scheme relating to amplifiers: a circuit being added at the input of an amplifier to adapt the input impedance of the amplifier

Wideband low-noise amplifier

Life of this patent

Wideband low-noise amplifier

Life of this patent

Abstract

Claims14