US5384558A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio-frequency integrated circuit device having adjustable matching circuit
Assignee: NEC Corp
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Filing: 1994-05-31
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Granted: 1995-01-24
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Expires: 2014-05-31
Abstract
Abstract A radio-frequency integrated circuit has a transmission line which is short-circuited at an RF short-circuiting point to ground through an RF short-circuiting and DC blocking capacitor. The transmission line is connected to a bias supply point. The circuit has a matching circuit constituted by the transmission line and has a short-circuit stub and an adjusting capacitor. The short-circuit stub has first bonding points to which the bias voltage is applied and the adjusting capacitor has second bonding points which are selectively wire-bonded with the first bonding points. By selecting the positions at which the bonding points are interconnected, the impedance of the matching circuit can be adjusted.
Inventors
- 👤 Kenichi Maruhashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:00
CPC Classifications
H; H01; H01P; H01P5/00; H01P5/04
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
75 words
A radio-frequency integrated circuit device having a matching circuit constituted by a transmission line on a substrate, said matching circuit comprising: a short-circuit stub to which a bias voltage is applied, said short-circuit stub being short-circuited to ground through a capacitor; and an adjusting capacitor which is disposed adjacent to said short-circuit stub, a first electrode of which is grounded and a second electrode of which is connected to said short-circuit stub by a bonding-wire.
Claim 2
Dependent Claim
75 words
A radio-frequency integrated circuit device having a matching circuit constituted by a transmission line on a substrate, said matching circuit comprising: a short-circuit stub to which a bias voltage is applied, said short-circuit stub being short-circuited to ground through a capacitor; and an adjusting capacitor which is disposed adjacent to said short-circuit stub, a first electrode of which is grounded and a second electrode of which is connected to said short-circuit stub by a bonding-wire.
Claim 3
Dependent Claim
25 words
A radio-frequency integrated circuit device according to claim 1, in which said first electrode of said adjusting capacitor is formed by a ground potential surface.
Claim 4
Dependent Claim
32 words
A radio-frequency integrated circuit device according to claim 1, in which said first electrode of said adjusting capacitor is connected to a ground potential surface through a through-hole provided in the substrate.
Claim 5
Dependent Claim
19 words
A radio-frequency integrated circuit device according to claim 1, in which said short-circuit stub comprises a coplanar transmission line.
Claim 6
Dependent Claim
18 words
A radio-frequency integrated circuit device according to claim 1, in which said short-circuit stub comprises a microstrip line.
Claim 7
Dependent Claim
26 words
A radio-frequency integrated circuit device according to claim 1, in which a plurality of said adjusting capacitors are provided at one side of said short-circuit stub.
Claim 8
Dependent Claim
26 words
A radio-frequency integrated circuit device according to claim 1, in which a plurality of said adjusting capacitors are provided at both sides of said short-circuit stub.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-01-23 | 1998-07-25 | 1999-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-01-23 | 2002-07-25 | 2003-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-01-23 | 2006-07-25 | 2007-01-24 | $7700.00 | Window Closed / Lapsed |