US5212835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency-conversion mixer
Assignee: Kokan Densetsu Kogyo KK
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Filing: 1990-07-18
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Granted: 1993-05-18
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Expires: 2010-07-18
Abstract
Abstract A frequency-conversion mixer, which is designed to operate in substantially the whole range of the radio frequency band extending from low frequency to the ultra-high frequency, has first and second diodes inversely arranged in parallel connection between a first input terminal for a receiving signal and a junction point. Third and fourth diodes are connected in forward series between a common terminal and a second input terminal for an oscillator signal with the junction point between the third and fourth diodes. A dc component removing capacitor is connected to the junction point for providing a frequency mixed signal, whereby the use of a transformer as used in a double balanced mixer is eliminated and there is practically no output response at frequencies below the cutoff frequency of the diodes.
Inventors
- 👤 Eiji Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:58
CPC Classifications
H; H03; H03D; H03D7/00; H03D7/14; H03D7/1408
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
103 words
A frequency-conversion mixer comprising: input means having a parallel circuit including a first and second diode arranged in inverse parallel connection with each other for inputting input signals from its one terminal; detecting means having a series circuit including a third and fourth diode arranged in forward series connection, the other terminal of said parallel circuit being connected to the junction point of said third and fourth diode and local oscillating signals being supplied to one of said series circuit; and a capacitor of which one terminal is connected to said junction point, the frequency-converted signals being taken out from the other terminal.
Claim 2
Dependent Claim
103 words
A frequency-conversion mixer comprising: input means having a parallel circuit including a first and second diode arranged in inverse parallel connection with each other for inputting input signals from its one terminal; detecting means having a series circuit including a third and fourth diode arranged in forward series connection, the other terminal of said parallel circuit being connected to the junction point of said third and fourth diode and local oscillating signals being supplied to one of said series circuit; and a capacitor of which one terminal is connected to said junction point, the frequency-converted signals being taken out from the other terminal.
Claim 3
Dependent Claim
23 words
A frequency-conversion mixer according to claim 1, wherein said input means and said detecting means are in the form of a one-chip IC.
Claim 4
Dependent Claim
25 words
A frequency-conversion mixer according to claim 1, wherein said input means, said detecting means and said capacitor are in the form of a one-chip IC.
Claim 5
Dependent Claim
33 words
A frequency-conversion mixer according to claim 1, wherein a signal of a first frequency is supplied to said input means, and a signal of a second frequency is supplied to said detecting means.
Claim 6
Dependent Claim
34 words
A frequency-conversion mixer according to claim 4, wherein a signal of a frequency corresponding to the difference and sum of said first and second frequencies is produced from an output terminal of said capacitor.
Claim 7
Dependent Claim
38 words
A frequency-conversion mixer according to claim 5, further comprising a filter connected to the output terminal of said capacitor to pass said signal of the frequency corresponding to the difference or sum of said first and second frequencies.
Claim 8
Dependent Claim
59 words
A frequency-conversion mixer according to claim 1, wherein a signal of a second frequency is supplied to said detecting means and a signal of a third frequency is supplied to an output side of said capacitor whereby a signal of frequency corresponding to the difference or sum of said second and third frequencies is produced from said input means.
Claim 9
Dependent Claim
114 words
A frequency-conversion mixer, comprising: input means for providing a receiving signal of a first frequency, the input means having a first input terminal for receiving the receiving signal, a junction point, and first and second oppositely oriented diodes connected in parallel between the first input terminal and the junction point; detecting means for providing a local-oscillator signal, the detecting means having a second input terminal for receiving the local-oscillator signal, a common terminal, and third and fourth diodes connected in forward series from the common terminal to the second input terminal with the junction point connected between the third and fourth diodes; and capacitive means for outputting a frequency-mixed signal from the junction point.
Claim 10
Dependent Claim
114 words
A frequency-conversion mixer, comprising: input means for providing a receiving signal of a first frequency, the input means having a first input terminal for receiving the receiving signal, a junction point, and first and second oppositely oriented diodes connected in parallel between the first input terminal and the junction point; detecting means for providing a local-oscillator signal, the detecting means having a second input terminal for receiving the local-oscillator signal, a common terminal, and third and fourth diodes connected in forward series from the common terminal to the second input terminal with the junction point connected between the third and fourth diodes; and capacitive means for outputting a frequency-mixed signal from the junction point.
Claim 11
Dependent Claim
31 words
The frequency-conversion mixer according to claim 8, wherein the capacitive means comprises a capacitor having one terminal connected to the junction point and an opposite terminal for outputting the frequency-mixed signal.
Claim 12
Dependent Claim
13 words
The frequency-conversion mixer according to claim 8, wherein the common terminal is grounded.
Claim 13
Dependent Claim
13 words
The frequency-conversion mixer according to claim 9, wherein the common terminal is grounded.
Claim 14
Dependent Claim
30 words
The frequency-conversion mixer according to claim 8, and further comprising a filter for receiving the outputted frequency-mixed signal and providing a final signal of only some frequency or frequencies thereof.
Claim 15
Dependent Claim
30 words
The frequency-conversion mixer according to claim 9, and further comprising a filter for receiving the outputted frequency-mixed signal and providing a final signal of only some frequency or frequencies thereof.
Claim 16
Dependent Claim
30 words
The frequency-conversion mixer according to claim 10, and further comprising a filter for receiving the outputted frequency-mixed signal and providing a final signal of only some frequency or frequencies thereof.
Claim 17
Dependent Claim
30 words
The frequency-conversion mixer according to claim 11, and further comprising a filter for receiving the outputted frequency-mixed signal and providing a final signal of only some frequency or frequencies thereof.
References Cited (Backward Citations)
JPS538005A
Cited
US4245355A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-05-17 | 1996-11-16 | 1997-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-17 | 2000-11-16 | 2001-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-17 | 2004-11-16 | 2005-05-18 | $7700.00 | Window Closed / Lapsed |