US3890573A
Expired / Lapsed
US
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High conversion efficiency harmonic mixer
Assignee: SP-MICROWAVE Inc
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Filing: 1974-06-10
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Granted: 1975-06-17
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Expires: 1994-06-10
Abstract
Abstract A high conversion efficiency harmonic signal mixer is provided by employing in a mixer circuit a non-rectifying semiconductor device having a generally symmetric response in the first and third quadrants of its voltage-current characteristic curve and a substantially central substantially non-conducting response adjacent the zero voltage and zero current origin of the characteristic curve.
Inventors
- 👤 Harry F Strenglein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:56
CPC Classifications
H; H03; H03D; H03D9/00; H03D9/06; H03D9/0608; H03D9/0633; H03B; H03B19/00; H03B19/16; H03B19/18; H03D2200/00; H03D2200/0001; H03D2200/0017
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
88 words
Harmonic signal mixer means comprising: high pass signal input filter means, low pass filter means in series relation with said high pass signal input filter means, high pass local oscillator signal input filter means in series relation with said low pass filter means, low pass intermediate frequency signal output means coupled between said low pass filter means and said high pass local oscillAtor signal input filter means, and non-rectifying signal mixer circuit means coupled between said high pass signal input filter means and said low pass filter means.
Claim 2
Dependent Claim
88 words
Harmonic signal mixer means comprising: high pass signal input filter means, low pass filter means in series relation with said high pass signal input filter means, high pass local oscillator signal input filter means in series relation with said low pass filter means, low pass intermediate frequency signal output means coupled between said low pass filter means and said high pass local oscillAtor signal input filter means, and non-rectifying signal mixer circuit means coupled between said high pass signal input filter means and said low pass filter means.
Claim 3
Dependent Claim
28 words
Apparatus as described in claim 1 wherein said non-rectifying signal mixer circuit means includes dual port semiconductor means having the general voltage versus current characteristic of FIG. 10.
Claim 4
Dependent Claim
88 words
Apparatus as described in claim 1 wherein said non-rectifying signal mixer circuit means includes dual port semiconductor means having generally a voltage versus current characteristic including: a first finite region in which positive current values are generally proportional to positive voltage values, a second finite region in which negative current values are generally proportional to negative voltage values, and a third finite region joining said first and second finite regions, including the zero current-zero voltage locus, wherein the current is substantially zero for finite value of the voltage.
Claim 5
Dependent Claim
16 words
Apparatus as described in claim 3 wherein said dual port semiconductor means comprises a backward diode.
Claim 6
Dependent Claim
19 words
Apparatus as described in claim 3 wherein said dual port semiconductor means comprises semiconductor diodes coupled in back-to-back relation.
Claim 7
Dependent Claim
19 words
Apparatus as described in claim 3 including means for preventing direct current flow through said dual port semiconductor means.
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) | 1978-06-16 | 1978-12-16 | 1979-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-16 | 1982-12-16 | 1983-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-16 | 1986-12-16 | 1987-06-17 | $7700.00 | Window Closed / Lapsed |