Patent US7205844B2 successfully refreshed from Google Patents.
US7205844B2
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US
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Low noise and high gain low noise amplifier
Assignee: Richwave Technology Corp
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Filing: 2005-01-28
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Granted: 2007-04-17
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Expires: 2025-01-28
Abstract
Abstract high-gain and low-noise low noise amplifier (LNA) includes a differential amplifier, a pre-amplifier and an impedance matching network. The differential amplifier includes a first input end and a second input end coupled to a grounded impedance. The pre-amplifier includes an input end and an output end. The impedance matching network is coupled between the first input end of the differential amplifier and the output end of the pre-amplifier for matching an input impedance of the differential amplifier with an output impedance of the pre-amplifier. The present invention provides a LNA structure with low noise, high gain and easy design.
Inventors
- 👤 Jiong-Guang Su
- 👤 Tsyr-Shyang Liou
- 👤 Shyh-Chyi Wong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 11:24
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/45; H03F3/45071; H03F3/45076; H03F3/45179; H03F3/45183; H03F3/45188; H03F1/00; H03F1/26; H03F2200/00; H03F2200/294; H03F2200/372; H03F2203/00; H03F2203/45; H03F2203/45288; H03F2203/45592; H03F2203/45621
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
89 words
A high-gain and low-noise low noise amplifier (LNA) comprising: a differential amplifier comprising a first input end and a second input end coupled to a grounded impedance; a single transistor pre-amplifier comprising an input end and an output end wherein a drain of the single transistor is connected to a load; and an impedance matching network coupled between the first input end of the differential amplifier and the output end of the pre-amplifier for matching an input impedance of the differential amplifier with an output impedance of the pre-amplifier.
Claim 2
Dependent Claim
89 words
A high-gain and low-noise low noise amplifier (LNA) comprising: a differential amplifier comprising a first input end and a second input end coupled to a grounded impedance; a single transistor pre-amplifier comprising an input end and an output end wherein a drain of the single transistor is connected to a load; and an impedance matching network coupled between the first input end of the differential amplifier and the output end of the pre-amplifier for matching an input impedance of the differential amplifier with an output impedance of the pre-amplifier.
Claim 3
Dependent Claim
20 words
The high-gain LNA of claim 1 further comprising an input impedance coupled to the input end of the pre- amplifier.
Claim 4
Dependent Claim
40 words
The high-gain LNA of claim 1 wherein the pre-amplifier is a common-source single transistor amplifier further comprising: an impedance-matching load connected to the drain of the transistor; and a degenerate impedance coupled between the source of the transistor and ground.
Claim 5
Dependent Claim
21 words
The high-gain LNA of claim 1 wherein the second input end of the differential amplifier is coupled to a capacitance impedance.
Claim 6
Dependent Claim
15 words
The high-gain LNA of claim 1 wherein the differential amplifier has two differential output ends.
References Cited (Backward Citations)
US4366446A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2010-04-16 | 2010-10-16 | 2011-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2014-04-16 | 2014-10-16 | 2015-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2018-04-16 | 2018-10-16 | 2019-04-17 | $7700.00 | Window Closed / Lapsed |