US4685041A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resonant rectifier circuit
Assignee: Nokia Bell Labs
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Filing: 1986-08-08
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Granted: 1987-08-04
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Expires: 2006-08-08
Abstract
Abstract A self-oscillating power converter utilizes a MOSFET power transistor switch with its output electrode coupled to a tuned network that operatively limits the voltage waveform across the power switch to periodic unipolar pulses. The transistor switch may be operated at a high radio frequency so that its drain to gate interelectrode capacitance is sufficient to comprise the sole oscillatory sustaining feedback path of the converter. A reactive network which is inductive at the operating frequency couples the gate to source electrodes of the transistor switch and includes a variable capacitance as a means of adjusting the overall reactance, and hence the converter's switching frequency in order to provide voltage regulation. A resonant rectifier includes a tuned circuit to shape the voltage waveform across the rectifying diodes as a time inverse of the power switch waveform. The input resistance of the rectifier is controlled so that it is invariant to frequency change within the switching frequency range of the converter but inversely proportional to the load resistance.
Inventors
- 👤 Wayne C. Bowman
- 👤 Frank M. Magalhaes
- 👤 Weyman B. Suiter, Jr.
- 👤 Norman G. Ziesse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:14
CPC Classifications
H; H02; H02M; H02M3/00; H02M3/22; H02M3/24; H02M3/28; H02M3/325; H02M3/335; H02M3/338; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/4815; H02M7/4818; Y; Y02; Y02B; Y02B70/00; Y02B70/10
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
164 words
A power rectifying circuit comprising: an input for accepting a high frequency, substantially sinusoidal signal lying within a predefined operating frequency range, an output for accepting a load to be energized, a first inductance associated with the input, a first capacitance associated with the input, a network, including a rectifying diode coupling the input to the output, the diode including significant adjunct capacitance, a second inductance included within the network, a second capacitance included within the network and including the adjunct capacitance, the first and second capacitance and the first and second inductance being tuned to obtain first and second frequency response poles in an impedance of the input selected such that the first and second frequency response poles are bracketing a predefined frequency range of the sinusoidal signal and further having network quality adjusted so that a resistive component of impedance at the input is substantially invariant with respect to frequency variations of the high frequency signal over the predefined operating frequency range.
Claim 2
Dependent Claim
164 words
A power rectifying circuit comprising: an input for accepting a high frequency, substantially sinusoidal signal lying within a predefined operating frequency range, an output for accepting a load to be energized, a first inductance associated with the input, a first capacitance associated with the input, a network, including a rectifying diode coupling the input to the output, the diode including significant adjunct capacitance, a second inductance included within the network, a second capacitance included within the network and including the adjunct capacitance, the first and second capacitance and the first and second inductance being tuned to obtain first and second frequency response poles in an impedance of the input selected such that the first and second frequency response poles are bracketing a predefined frequency range of the sinusoidal signal and further having network quality adjusted so that a resistive component of impedance at the input is substantially invariant with respect to frequency variations of the high frequency signal over the predefined operating frequency range.
Claim 3
Dependent Claim
136 words
A power rectifying circuit comprising: an input for accepting a high frequency, substantially sinusoidal signal lying within a predefined operating frequency range, an output for accepting a load to be energized, a first inductance associated with the input, a first capacitance associated with the input, a network, including a rectifying diode coupling the input to the output, the diode including significant adjunct capacitance, a second inductance included within the network, a second capacitance included within the network and including the adjunct capacitance, the first and second capacitance and the first and second inductance being tuned and adapted to achieve a network quality adjusted to provide an LC impedance transformation between the input and output so that a resistive component of impedance of the input varies inversely with a change of a resistance value of the load.
Claim 4
Dependent Claim
136 words
A power rectifying circuit comprising: an input for accepting a high frequency, substantially sinusoidal signal lying within a predefined operating frequency range, an output for accepting a load to be energized, a first inductance associated with the input, a first capacitance associated with the input, a network, including a rectifying diode coupling the input to the output, the diode including significant adjunct capacitance, a second inductance included within the network, a second capacitance included within the network and including the adjunct capacitance, the first and second capacitance and the first and second inductance being tuned and adapted to achieve a network quality adjusted to provide an LC impedance transformation between the input and output so that a resistive component of impedance of the input varies inversely with a change of a resistance value of the load.
Claim 5
Dependent Claim
198 words
A power rectifying circuit comprising: an input for accepting a high frequency, substantially sinusoidal signal lying within a predefined operating frequency range, an output for accepting a load to be energized, a first inductance associated with the input, a first capacitance associated with the input, a network including a rectifying diode coupling the input to the output, the rectifying diode including significant adjunct capacitance, a second inductance included within the network, a second capacitance included within the network and including the adjunct capacitance, the first and second capacitance and the first and second inductance being tuned to obtain first and second frequency response poles in an impedance of the input selected such that the first and second frequency response poles are bracketing a predefined operating frequency range of the sinusoidal signal so that a resistive component of impedance at the input is substantially invariant with respect to frequency variations of the high frequency signal over a predetermined operating frequency range, and further having a network quality adjusted so that an LC impedance transformation between the input and output assures that a resistive impedance of the input varies inversely with a change of a resistance value of the load.
Claim 6
Dependent Claim
198 words
A power rectifying circuit comprising: an input for accepting a high frequency, substantially sinusoidal signal lying within a predefined operating frequency range, an output for accepting a load to be energized, a first inductance associated with the input, a first capacitance associated with the input, a network including a rectifying diode coupling the input to the output, the rectifying diode including significant adjunct capacitance, a second inductance included within the network, a second capacitance included within the network and including the adjunct capacitance, the first and second capacitance and the first and second inductance being tuned to obtain first and second frequency response poles in an impedance of the input selected such that the first and second frequency response poles are bracketing a predefined operating frequency range of the sinusoidal signal so that a resistive component of impedance at the input is substantially invariant with respect to frequency variations of the high frequency signal over a predetermined operating frequency range, and further having a network quality adjusted so that an LC impedance transformation between the input and output assures that a resistive impedance of the input varies inversely with a change of a resistance value of the load.
Claim 7
Dependent Claim
18 words
A power rectifying circuit as defined in claims 1, 2, or 3 wherein the input includes a transformer.
Claim 8
Dependent Claim
20 words
A power rectifying circuit as defined in claim 4 wherein the second inductance includes a leakage inductance of the transformer.
Claim 9
Dependent Claim
20 words
A power rectifying circuit as defined in claim 4 wherein the first inductance includes a magnetizing inductance of the transformer.
Claim 10
Dependent Claim
31 words
A power rectifying circuit as defined in claim 4 wherein the first inductance includes a magnetizing inductance of the transformer and the second inductance includes a leakage inductance of the transformer.
Claim 11
Dependent Claim
27 words
A power rectifying circuit as defined in claim 1, 2, or 3 and further including means for filtering a rectified signal to obtain a substantially DC output.
Claim 12
Dependent Claim
35 words
A power rectifying circuit as defined in claim 1, 2, or 3 wherein the network includes a second rectifying diode having significant adjunct capacitance and being connected to conduct alternately with the first rectifying diode.
Claim 13
Dependent Claim
24 words
A power rectifying circuit as defined in claim 1, 2, or 3 wherein the second capacitance includes a discrete capacitance shunting the rectifying diode.
Claim 14
Dependent Claim
169 words
A power rectifying circuit for a power converter circuit having an inverter circuit generating a substantially sinusoidal signal and an energy transfer between the inverter and the rectifying circuit being substantially at a single frequency lying within a defined regulatory frequency range, comprising: an input for accepting a substantially sinusoidal signal, an output for supplying a load, a rectifying diode located intermediate to the input and output, a first inductive reactance at the input, a first capacitive reactance at the input, a second inductive reactance within the rectifying circuit, a second capacitive reactance including adjunct capacitance of the rectifying diode within the rectifying circuit, the first and second inductive reactance and the first and second capacitive reactance being tuned to establish first and second frequency response poles in an impedance of the input, the first and second frequency response poles selected to bracket the defined regulatory frequency range whereby a resistive component of impedance at the input is substantially invariant to frequency change within the defined regulatory frequency range.
Claim 15
Dependent Claim
169 words
A power rectifying circuit for a power converter circuit having an inverter circuit generating a substantially sinusoidal signal and an energy transfer between the inverter and the rectifying circuit being substantially at a single frequency lying within a defined regulatory frequency range, comprising: an input for accepting a substantially sinusoidal signal, an output for supplying a load, a rectifying diode located intermediate to the input and output, a first inductive reactance at the input, a first capacitive reactance at the input, a second inductive reactance within the rectifying circuit, a second capacitive reactance including adjunct capacitance of the rectifying diode within the rectifying circuit, the first and second inductive reactance and the first and second capacitive reactance being tuned to establish first and second frequency response poles in an impedance of the input, the first and second frequency response poles selected to bracket the defined regulatory frequency range whereby a resistive component of impedance at the input is substantially invariant to frequency change within the defined regulatory frequency range.
Claim 16
Dependent Claim
151 words
A power rectifying circuit for a power converter circuit having an inverter circuit generating a substantially sinusoidal signal and an energy transfer between the inverter and the power rectifying circuit being substantially at a single frequency lying within a defined regulatory frequency range, comprising: an input for accepting a substantially sinusoidal signal, an output for supplying a load, a rectifying diode located intermediate to the input and output, a first inductive reactance at the input, a first capacitive reactance at the input, a second inductive reactance within the rectifying circuit, a second capacitive reactance including adjunct capacitance of the rectifying diode within the rectifying circuit, the first and second inductive reactance and the first and second capacitive reactance being selected for providing an LC impedance transformation between the input and the output such that a resistive component of impedance at the input varies inversely with a load resistance at the output.
Claim 17
Dependent Claim
151 words
A power rectifying circuit for a power converter circuit having an inverter circuit generating a substantially sinusoidal signal and an energy transfer between the inverter and the power rectifying circuit being substantially at a single frequency lying within a defined regulatory frequency range, comprising: an input for accepting a substantially sinusoidal signal, an output for supplying a load, a rectifying diode located intermediate to the input and output, a first inductive reactance at the input, a first capacitive reactance at the input, a second inductive reactance within the rectifying circuit, a second capacitive reactance including adjunct capacitance of the rectifying diode within the rectifying circuit, the first and second inductive reactance and the first and second capacitive reactance being selected for providing an LC impedance transformation between the input and the output such that a resistive component of impedance at the input varies inversely with a load resistance at the output.
Claim 18
Dependent Claim
209 words
A power rectifying circuit for a power converter circuit having an inverter circuit generating a substantially sinusoidal signal and an energy transfer between the inverter and the power rectifying circuit being substantially at a single frequency within a defined regulatory frequency range, comprising: an input for accepting a substantially sinusoidal signal, an output for supplying a load, a rectifying diode located intermediate to the input and output, a first inductive reactance at the input, a first capacitive reactance at the input, a second inductive reactance within the rectifying circuit, a second capacitive reactance including adjunct capacitance of the rectifying diode within the rectifying circuit, the first and second inductive reactances and the first and second capacitive reactances being tuned to establish first and second frequency response poles in an impedance of the input, the first and second frequency response poles selected to bracket the defined regulatory frequency range whereby a resistive component of impedance at the input is substantially invariant to frequency change within the defined regulatory frequency range, and a circuit quality of the power rectifier further being adapted for providing LC impedance transformation between the input and the output such that a resistive component of impedance at the input varies inversely with load resistance at the output.
Claim 19
Dependent Claim
209 words
A power rectifying circuit for a power converter circuit having an inverter circuit generating a substantially sinusoidal signal and an energy transfer between the inverter and the power rectifying circuit being substantially at a single frequency within a defined regulatory frequency range, comprising: an input for accepting a substantially sinusoidal signal, an output for supplying a load, a rectifying diode located intermediate to the input and output, a first inductive reactance at the input, a first capacitive reactance at the input, a second inductive reactance within the rectifying circuit, a second capacitive reactance including adjunct capacitance of the rectifying diode within the rectifying circuit, the first and second inductive reactances and the first and second capacitive reactances being tuned to establish first and second frequency response poles in an impedance of the input, the first and second frequency response poles selected to bracket the defined regulatory frequency range whereby a resistive component of impedance at the input is substantially invariant to frequency change within the defined regulatory frequency range, and a circuit quality of the power rectifier further being adapted for providing LC impedance transformation between the input and the output such that a resistive component of impedance at the input varies inversely with load resistance at the output.
Claim 20
Dependent Claim
18 words
A power rectifying circuit as defined in claims 11, 12, or 13 wherein the input includes a transformer.
Claim 21
Dependent Claim
21 words
A power rectifying circuit as defined in claim 14 wherein the first inductive reactance includes a magnetizing inductance of the transformer.
Claim 22
Dependent Claim
21 words
A power rectifying circuit as defined in claim 14 wherein the second inductive reactance includes a leakage inductance of the transformer.
Claim 23
Dependent Claim
33 words
A power rectifying circuit as defined in claim 14 wherein the first inductive reactance includes a magnetizing inductance of the transformer, and the second inductive reactance includes a leakage inductance of the transformer.
Claim 24
Dependent Claim
25 words
A power rectifying circuit as defined in claim 11, 12 or 13 wherein the second capacitive reactance includes a discrete capacitor shunting the rectifying diode.
Claim 25
Dependent Claim
32 words
A rectifying circuit as defined in claim 11, 12 or 13 and further including a second rectifying diode including significant adjunct capacitance and connected to conduct alternately with the first rectifying diode.
Claim 26
Dependent Claim
27 words
A power rectifying circuit as defined in claim 11, 12, or 13 and further including means for filtering a rectified signal to obtain a substantially DC output.
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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) | 1990-08-03 | 1991-02-02 | 1991-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-03 | 1995-02-02 | 1995-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-03 | 1999-02-02 | 1999-08-04 | $7700.00 | Window Closed / Lapsed |