Patent US4560951A successfully refreshed from Google Patents.
US4560951A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage-controlled oscillator with surface-wave transmission line
Assignee: Siemens AG
•
Filing: 1984-02-02
•
Granted: 1985-12-24
•
Expires: 2004-02-02
Abstract
Abstract A voltage-controlled oscillator includes an amplifier having two emitter-coupled differential amplifier stages, and in whose feedback network, connected in series, are a 3dB-90° coupler and a surface-wave transmission line. Two variable capacitance diodes are connected to the two terminals of the coupler that are not used as input or output terminals, and a frequency control voltage is applied to both diodes. The oscillator is particularly well-suited for the transmission of digital signals with transmission speeds of over 100 Mbit/s.
Inventors
- 👤 Augustin Futterer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:40
CPC Classifications
H; H03; H03B; H03B5/00; H03B5/30; H03B5/32; H03B5/326
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
69 words
In a voltage-controlled oscillator with an amplifier and a feedback network having variable capacitance diodes, the improvement comprising the feedback network including a surface-wave transmission line with a pass band corresponding to the desired oscillator frequency connected in a series with a 3dB-90° coupler, and two variable capacitance diodes connected through coupling capacitors with two terminals of the 3dB-90° coupler that are not used as input or output terminals.
Claim 2
Dependent Claim
69 words
In a voltage-controlled oscillator with an amplifier and a feedback network having variable capacitance diodes, the improvement comprising the feedback network including a surface-wave transmission line with a pass band corresponding to the desired oscillator frequency connected in a series with a 3dB-90° coupler, and two variable capacitance diodes connected through coupling capacitors with two terminals of the 3dB-90° coupler that are not used as input or output terminals.
Claim 3
Dependent Claim
53 words
The voltage-controlled oscillator according to claim 1, wherein an outlet of the amplifier is connected to an input terminal of the 3dB-90° coupler, an output terminal of the coupler is connected with an inlet of the surface-wave transmission line, and an outlet of the surface-wave transmission line is connected with an amplifier inlet.
Claim 4
Dependent Claim
59 words
The voltage-controlled oscillator according to claim 1, wherein anode terminals of the capacitance diodes in the 3dB coupler are respectively connected separately through a coupling capacitor with the two terminals of the 3dB coupler and through a decoupling resistance with a source of control voltage, and the cathode terminals of the capacitance diodes are connected to a reference potential.
Claim 5
Dependent Claim
59 words
The voltage-controlled oscillator according to claim 2, wherein anode terminals of the capacitance diodes in the 3dB coupler are respectively connected separately through a coupling capacitor with the two terminals of the 3dB coupler and through a decoupling resistance with a source of control voltage, and the cathode terminals of the capacitance diodes are connected to a reference potential.
Claim 6
Dependent Claim
15 words
The voltage-controlled oscillator according to claim 1, wherein the capacitance diodes have a hyperabrupt characteristic.
Claim 7
Dependent Claim
15 words
The voltage-controlled oscillator according to claim 3, wherein the capacitance diodes have a hyperabrupt characteristic.
Claim 8
Dependent Claim
85 words
The voltage-controlled oscillator according to claim 1, wherein the surface-wave transmission line has two input terminals of which one is connected with an output terminal of the 3dB-90° coupler and the other with a reference potential, and both input terminals are connected in a parallel circuit which includes an ohmic resistance, with a value roughly corresponding to the characteristic impedance of the 3dB-90° coupler, and a first balancing inductance, and the surface-wave transmission line has two output terminals which are connected through another balancing inductance.
Claim 9
Dependent Claim
85 words
The voltage-controlled oscillator according to claim 2, wherein the surface-wave transmission line has two input terminals of which one is connected with an output terminal of the 3dB-90° coupler and the other with a reference potential, and both input terminals are connected in a parallel circuit which includes an ohmic resistance, with a value roughly corresponding to the characteristic impedance of the 3dB-90° coupler, and a first balancing inductance, and the surface-wave transmission line has two output terminals which are connected through another balancing inductance.
Claim 10
Dependent Claim
67 words
The voltage-controlled oscillator according to claim 1, wherein the amplifier includes two emitter-coupled differential amplifiers connected in series, which are operated in push-pull with the step inlets of the first emitter-coupled differential amplifier being respectively connected separately to outlets of the surface-wave transmission line and the step inlets of the second emitter-coupled differential amplifier are respectively connected with the step outlets of the first emitter-coupled differential amplifier.
Claim 11
Dependent Claim
67 words
The voltage-controlled oscillator according to claim 2, wherein the amplifier includes two emitter-coupled differential amplifiers connected in series, which are operated in push-pull with the step inlets of the first emitter-coupled differential amplifier being respectively connected separately to outlets of the surface-wave transmission line and the step inlets of the second emitter-coupled differential amplifier are respectively connected with the step outlets of the first emitter-coupled differential amplifier.
Claim 12
Dependent Claim
39 words
The voltage-controlled oscillator according to claim 9, wherein an emitter follower is connected to one of the outlets of the second differential amplifier, and an emitter terminal of the emitter follower constitutes the output terminal of the voltage-controlled oscillator.
References Cited (Backward Citations)
US3855548A
Cited
US4011526A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-12-23 | 1989-06-24 | 1989-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-23 | 1993-06-24 | 1993-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-23 | 1997-06-24 | 1997-12-24 | $7700.00 | Window Closed / Lapsed |