US4563772A
Expired / Lapsed
US
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High frequency mixer stage
Assignee: Licentia Patent Verwaltungs GmbH
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Filing: 1983-05-05
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Granted: 1986-01-07
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Expires: 2003-05-05
Abstract
Abstract The invention relates to a high frequency mixer stage comprising a field-effect transistor tetrode having two gate electrodes, with one gate electrode being supplied with the high frequency input signal. According to the invention, the mixer stage becomes a frequency changer by means of inductive load at the second gate electrode of the tetrode.
Inventors
- 👤 Heinz Beneking
- 👤 Rainer Stahlmann
- 👤 Christos Tsironis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:12
CPC Classifications
H; H03; H03D; H03D7/00; H03D7/12; H03D7/125; H03B; H03B5/00; H03B5/08; H03B5/12; H03B5/1203; H03B5/1228; H03B2200/00; H03B2200/006; H03B2200/0074; H03B5/18; H03B5/1841; H03B5/1847; H03D2200/00; H03D2200/0001; H03D2200/0007
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
78 words
High frequency mixer stage comprising a field-effect transistor tetrode with two gate electrodes, means supplying a high frequency input signal to one of the gate electrodes, and two terminal means connected between the second gate electrode (G 2 ) and a ground terminal for setting operating point of the tetrode such that self-oscillation and, consequently, frequency conversion occurs substantially due to cooperation of said tetrode and said two-terminal means, wherein said two terminal means is an inductive load.
Claim 2
Dependent Claim
78 words
High frequency mixer stage comprising a field-effect transistor tetrode with two gate electrodes, means supplying a high frequency input signal to one of the gate electrodes, and two terminal means connected between the second gate electrode (G 2 ) and a ground terminal for setting operating point of the tetrode such that self-oscillation and, consequently, frequency conversion occurs substantially due to cooperation of said tetrode and said two-terminal means, wherein said two terminal means is an inductive load.
Claim 3
Dependent Claim
18 words
High frequency mixer stage according to claim 1, wherein the tetrode is a GaAs barrier layer field-effect transistor.
Claim 4
Dependent Claim
20 words
High frequency mixer stage according to claim 1 wherein said tetrode has a source electrode connected to said circuit ground.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-01-06 | 1989-07-08 | 1990-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-06 | 1993-07-08 | 1994-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-06 | 1997-07-08 | 1998-01-07 | $7700.00 | Window Closed / Lapsed |