US3689827A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage and current regulated power supply circuit for gaseous discharge lamp
Assignee: Cooper Industries LLC
•
Filing: 1970-12-30
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Granted: 1972-09-05
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Expires: 1990-12-30
Abstract
Abstract A voltage and current regulated circuit operative to supply sinusoidal high-frequency (28 kilohertz) electrical power which meets both the starting and running requirements of a gaseous discharge lamp without mechanical switching means or saturable reactors.
Inventors
- 👤 Halsey P Quinn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:50
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/53; H02M7/537; H02M7/539; Y; Y02; Y02B; Y02B70/00; Y02B70/10
Claims Analysis
Total Claims: 46
Claim 1
Independent Claim
158 words
A voltage and current regulated power supply circuit for a variable-impedance load, comprising: 1. first circuit means operative to convert alternating current power to direct current power which is applied to the remainder of said power supply circuit; 2. second circuit means operative in response to a variable bias signal to generate high-frequency pulses of variable width and substantially constant amplitude; 3. third circuit means which, when coupled to the variableimpedance load is operative in response to the output of said second circuit means to generate high frequency, high voltage output power when the load impedance is high, and to generate high frequency, low voltage output power when the load impedance is low; and 4. fourth circuit means operative to provide a variable bias signal to said second circuit means to vary the width of the output pulses of said second circuit means in response to variations in the output voltage and current from their predetermined normal levels.
Claim 2
Dependent Claim
158 words
A voltage and current regulated power supply circuit for a variable-impedance load, comprising: 1. first circuit means operative to convert alternating current power to direct current power which is applied to the remainder of said power supply circuit; 2. second circuit means operative in response to a variable bias signal to generate high-frequency pulses of variable width and substantially constant amplitude; 3. third circuit means which, when coupled to the variableimpedance load is operative in response to the output of said second circuit means to generate high frequency, high voltage output power when the load impedance is high, and to generate high frequency, low voltage output power when the load impedance is low; and 4. fourth circuit means operative to provide a variable bias signal to said second circuit means to vary the width of the output pulses of said second circuit means in response to variations in the output voltage and current from their predetermined normal levels.
Claim 3
Dependent Claim
27 words
a diode and a discharging resistance connected in series between the junction of said capacitance and said charging resistance and the output terminal of said high-frequency oscillator.
Claim 4
Dependent Claim
27 words
a diode and a discharging resistance connected in series between the junction of said capacitance and said charging resistance and the output terminal of said high-frequency oscillator.
Claim 5
Dependent Claim
8 words
an autotransformer having first, second and third terminals;
Claim 6
Dependent Claim
8 words
an autotransformer having first, second and third terminals;
Claim 7
Dependent Claim
50 words
first and second inductances each having first and second terminals, said first terminal of said first inductance being connected to said first output terminal of said diode bridge circuit, and said first terminal of said second inductance being connected to said second output terminal of said diode bridge circuit; and
Claim 8
Dependent Claim
50 words
first and second inductances each having first and second terminals, said first terminal of said first inductance being connected to said first output terminal of said diode bridge circuit, and said first terminal of said second inductance being connected to said second output terminal of said diode bridge circuit; and
Claim 9
Dependent Claim
5 words
a second-stage transistor switch; and
Claim 10
Dependent Claim
5 words
a second-stage transistor switch; and
Claim 11
Dependent Claim
33 words
current sensing circuit means operative to generate an output current deviating from a predetermined norm in response to variations in the output current of said power supply circuit from a predetermined value, and
Claim 12
Dependent Claim
33 words
current sensing circuit means operative to generate an output current deviating from a predetermined norm in response to variations in the output current of said power supply circuit from a predetermined value, and
Claim 13
Dependent Claim
22 words
second circuit means operative in response to a variable bias signal to generate high-frequency pulses of variable width and substantially constant amplitude;
Claim 14
Dependent Claim
22 words
second circuit means operative in response to a variable bias signal to generate high-frequency pulses of variable width and substantially constant amplitude;
Claim 15
Dependent Claim
14 words
The power supply circuit according to claim 1 wherein said first circuit means comprises:
Claim 16
Dependent Claim
10 words
saw-tooth pulse generating means synchronized with said high-frequency oscillator means;
Claim 17
Dependent Claim
10 words
saw-tooth pulse generating means synchronized with said high-frequency oscillator means;
Claim 18
Dependent Claim
14 words
a filtering capacitance connected between said second terminals of said first and second inductances.
Claim 19
Dependent Claim
14 words
a filtering capacitance connected between said second terminals of said first and second inductances.
Claim 20
Dependent Claim
22 words
The power supply circuit according to claim 2 wherein said first and second inductances are inductively coupled by a common magnetic core.
Claim 21
Dependent Claim
52 words
third circuit means which, when coupled to the variable-impedance load is operative in response to the output of said second circuit means to generate high frequency, high voltage output power when the load impedance is high, and to generate high frequency, low voltage output power when the load impedance is low; and
Claim 22
Dependent Claim
52 words
third circuit means which, when coupled to the variable-impedance load is operative in response to the output of said second circuit means to generate high frequency, high voltage output power when the load impedance is high, and to generate high frequency, low voltage output power when the load impedance is low; and
Claim 23
Dependent Claim
33 words
bias circuit means coupled to said voltage-and current-sensing circuit means and operative in response to the output voltage and current received therefrom to provide said variable bias signal to said second circuit means.
Claim 24
Dependent Claim
33 words
bias circuit means coupled to said voltage-and current-sensing circuit means and operative in response to the output voltage and current received therefrom to provide said variable bias signal to said second circuit means.
Claim 25
Dependent Claim
20 words
a series resonant circuit interconnecting the input of said first-stage transistor switch and the output of said second-stage transistor switch.
Claim 26
Dependent Claim
20 words
a series resonant circuit interconnecting the input of said first-stage transistor switch and the output of said second-stage transistor switch.
Claim 27
Dependent Claim
36 words
a power transistor having its base and emitter connected across said secondary winding of said transformer, and having its collector connected through said second and first terminals of said autotransformer to said first circuit means; and
Claim 28
Dependent Claim
36 words
a power transistor having its base and emitter connected across said secondary winding of said transformer, and having its collector connected through said second and first terminals of said autotransformer to said first circuit means; and
Claim 29
Dependent Claim
28 words
first amplification circuit means connected to said saw-tooth pulse generating circuit and operative to amplify the output of said saw-tooth pulse generating means and said variable bias signal;
Claim 30
Dependent Claim
28 words
first amplification circuit means connected to said saw-tooth pulse generating circuit and operative to amplify the output of said saw-tooth pulse generating means and said variable bias signal;
Claim 31
Dependent Claim
65 words
resonant circuit means connected between said first and thrid terminals of said autotransformer and operative to generate a high voltage by resonating at a first high frequency in response to input power pulses from said autotransformer when said load impedance is high, and by resonating at a second high frequency in response to input power pulses from said autotransformer when said load impedance is low.
Claim 32
Dependent Claim
65 words
resonant circuit means connected between said first and thrid terminals of said autotransformer and operative to generate a high voltage by resonating at a first high frequency in response to input power pulses from said autotransformer when said load impedance is high, and by resonating at a second high frequency in response to input power pulses from said autotransformer when said load impedance is low.
Claim 33
Dependent Claim
62 words
threshold circuit means having a first input terminal connected to the output of said first amplification circuit means and a second input terminal connected to the output of said high-frequency oscillator means, and operative to generate output pulses of constant amplitude and of variable width corresponding to the period of time during which both of said input pulses exceed its threshold; and
Claim 34
Dependent Claim
62 words
threshold circuit means having a first input terminal connected to the output of said first amplification circuit means and a second input terminal connected to the output of said high-frequency oscillator means, and operative to generate output pulses of constant amplitude and of variable width corresponding to the period of time during which both of said input pulses exceed its threshold; and
Claim 35
Dependent Claim
43 words
fourth circuit means operative to provide a variable bias signal to said second circuit means to vary the width of the output pulses of said second circuit means in response to variations in the output voltage and current from their predetermined normal levels.
Claim 36
Dependent Claim
43 words
fourth circuit means operative to provide a variable bias signal to said second circuit means to vary the width of the output pulses of said second circuit means in response to variations in the output voltage and current from their predetermined normal levels.
Claim 37
Dependent Claim
14 words
The power supply circuit according to claim 1 wherein said second circuit means comprises:
Claim 38
Dependent Claim
30 words
second amplification circuit means operative to generate output pulses of predetermined polarity, constant amplitude, and variable width corresponding to the width of the output pulses of said threshold circuit means.
Claim 39
Dependent Claim
30 words
second amplification circuit means operative to generate output pulses of predetermined polarity, constant amplitude, and variable width corresponding to the width of the output pulses of said threshold circuit means.
Claim 40
Dependent Claim
14 words
The power supply circuit according to claim 4 wherein said high-frequency oscillator mEans comprises:
Claim 41
Dependent Claim
40 words
The power supply circuit according to claim 5 wherein said high-frequency oscillator means is operative to close a discharge current path for said saw-tooth pulse generating means through said second transistor switch in the periods between adjacent high-frequency rectangular pulses.
Claim 42
Dependent Claim
17 words
The power supply circuit according to claim 4 wherein said threshold circuit means comprises a NAND gate.
Claim 43
Dependent Claim
18 words
The power supply circuit according to claim 4 wherein said second circuit means further comprises voltage regulation means.
Claim 44
Dependent Claim
15 words
The power supply circuit according to claim 8 wherein said saw-tooth pulse generating circuit comprises:
Claim 45
Dependent Claim
14 words
The power supply circuit according to claim 1 wherein said third circuit means comprises:
Claim 46
Dependent Claim
14 words
The power supply circuit according to claim 1 wherein said fourth circuit means comprises:
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) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |