US3798531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switching-mode power supply
Assignee: Instrumentation Specialties Co
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Filing: 1972-06-05
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Granted: 1974-03-19
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Expires: 1992-06-05
Abstract
Abstract To control the portion of each half cycle of alternating current that is conducted from the transformer to a rectifying voltage multiplier by a feedback-controlled alternating-current switch of a switching-mode power supply, the amplitude of a timing ramp potential which starts with the beginning of each half cycle of alternating current is compared to the amplitude of negative feedback from the power supply output by a differential amplifier that switches a single transistor in the alternating current switch into its conducting state when the timing ramp potential has a lower amplitude than the feedback and into its nonconducting state when the timing ramp potential has a higher amplitude than the feedback, with the transistor controlling the alternating current conducted through a diode bridge circuit connecting the transformer to the rectifying voltage multiplier so that a beginning portion of each half cycle of alternating current is conducted between the transformer and rectifying voltage multiplier until the timing ramp exceeds the feedback in amplitude, whereby the power supply is regulated.
Inventors
- 👤 R Allington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:39
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/12; G05F1/40; G05F1/44
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
387 words
A regUlated power supply of the switching-mode class having power supply input means adapted to receive alternating current potential and power supply output means adapted to provide direct current power, comprising: an alternating current switch input means; an alternating current switch output means; alternating current means for applying said alternating current input potential to said alternating current switch input means; alternating current switch means for electrically connecting said alternating current switch input means to said alternating current switch output means at the beginning of at least certain half cycles of said alternating current potential and for disconnecting said alternating current switch input means from said alternating current switch output means at a controlled time during said certain cycles, whereby beginning portions of said half cycles of alternating current potential are applied to said alternating current switch output means; rectifier means for rectifying said beginning portions of said half cycles, whereby direct current is formed; said rectifier means being electrically connected between said alternating current switch output means and said power supply output means, whereby direct current is applied to said power supply output means; and control means for controlling the time said alternating current switch disconnects said alternating current switch input means from said alternating current switch output means during said certain cycles, whereby a selected characteristic of said output direct current power is controlled; said alternating current switch means including means for forming an alternating current connection between the alternating current switch input means and the alternating current switch output means; said control means including a feedback input means and a feedback output means; said feedback input means being electrically connected to said power supply output means; said control means further including feedback means for providing a feedback signal to said feedback output means that varies inversely with said selected characteristic of said output direct current power, a timing circuit output means, timing means for applying the timing ramp potential to said timing circuit output means starting between half cycles of said alternating current potential, and comparator means electrically connected to said feedback output means and said timing circuit output means, for causing said alternating current switch means to disconnect said alternating current switch input means from said alternating current switch output means when said timing ramp potentials and said feedback signals have a predetermined relationship.
Claim 2
Dependent Claim
387 words
A regUlated power supply of the switching-mode class having power supply input means adapted to receive alternating current potential and power supply output means adapted to provide direct current power, comprising: an alternating current switch input means; an alternating current switch output means; alternating current means for applying said alternating current input potential to said alternating current switch input means; alternating current switch means for electrically connecting said alternating current switch input means to said alternating current switch output means at the beginning of at least certain half cycles of said alternating current potential and for disconnecting said alternating current switch input means from said alternating current switch output means at a controlled time during said certain cycles, whereby beginning portions of said half cycles of alternating current potential are applied to said alternating current switch output means; rectifier means for rectifying said beginning portions of said half cycles, whereby direct current is formed; said rectifier means being electrically connected between said alternating current switch output means and said power supply output means, whereby direct current is applied to said power supply output means; and control means for controlling the time said alternating current switch disconnects said alternating current switch input means from said alternating current switch output means during said certain cycles, whereby a selected characteristic of said output direct current power is controlled; said alternating current switch means including means for forming an alternating current connection between the alternating current switch input means and the alternating current switch output means; said control means including a feedback input means and a feedback output means; said feedback input means being electrically connected to said power supply output means; said control means further including feedback means for providing a feedback signal to said feedback output means that varies inversely with said selected characteristic of said output direct current power, a timing circuit output means, timing means for applying the timing ramp potential to said timing circuit output means starting between half cycles of said alternating current potential, and comparator means electrically connected to said feedback output means and said timing circuit output means, for causing said alternating current switch means to disconnect said alternating current switch input means from said alternating current switch output means when said timing ramp potentials and said feedback signals have a predetermined relationship.
Claim 3
Dependent Claim
36 words
A regulated power supply according to claim 1 in which said feedback means includes means for providing a feedback signal to said feedback output means that varies inversely with the potential of said direct current power.
Claim 4
Dependent Claim
39 words
A regulated power supply according to claim 1 in which said feedback means includes means for providing a feedback signal to said feedback output means that varies inversely with the amplitude of the current of said direct current power.
Claim 5
Dependent Claim
18 words
A regulated power supply according to claim 1 in which said rectifier means includes a rectifying voltage multiplier.
Claim 6
Dependent Claim
21 words
A regulated power supply according to claim 4 in which said rectifying voltage multiplier is a full wave rectifying voltage multiplier.
Claim 7
Dependent Claim
367 words
A regulated power supply of the switching-mode class having power supply input means adapted to receive alternating current potential and power supply output means adapted to provide direct current power, comprising: an alternating current switch input means; an alternating current switch output means; alternating current means for applying said alternating current input potential to said alternating current switch input means; alternating current switch means for electrically connecting said alternating current switCh input means to said alternating current switch output means at the beginning of at least certain half cycles of said alternating current potential and for disconnecting said alternating current switch input means from said alternating current switch output means at a controlled time during said certain cycles, whereby beginning portions of said half cycles of alternating current potential are applied to said alternating current switch output means; rectifier means for rectifying the beginning portions of said half cycles, whereby direct current is formed; said rectifier means being electrically connected between alternating current switch output means and said power supply output means whereby direct current is applied to said power supply output means; and control means for controlling said time said alternating current switch means disconnects said alternating current; switch input means from said alternating current switch output means during certain cycles, whereby a selected characteristic of said output direct current power is controlled; said alternating current switch means including a direct current switch having a direct current switch input means and a direct current switch output means and rectifier bridge means for connecting said alternating current switch input means to said direct current switch input means through a first rectifier current path, for connecting said alternating current output means to said direct current switch input means through a second rectifier current path, for connecting said direct current switch output means to said alternating current switch input means through a third rectifier current path and for connecting said direct current switch output means to said alternating current switch output means through a fourth rectifier current path, whereby an alternating current path is formed between said alternating current switch input and output means under the control of said direct switch; said rectifier means including a rectifying voltage multiplier.
Claim 8
Dependent Claim
367 words
A regulated power supply of the switching-mode class having power supply input means adapted to receive alternating current potential and power supply output means adapted to provide direct current power, comprising: an alternating current switch input means; an alternating current switch output means; alternating current means for applying said alternating current input potential to said alternating current switch input means; alternating current switch means for electrically connecting said alternating current switCh input means to said alternating current switch output means at the beginning of at least certain half cycles of said alternating current potential and for disconnecting said alternating current switch input means from said alternating current switch output means at a controlled time during said certain cycles, whereby beginning portions of said half cycles of alternating current potential are applied to said alternating current switch output means; rectifier means for rectifying the beginning portions of said half cycles, whereby direct current is formed; said rectifier means being electrically connected between alternating current switch output means and said power supply output means whereby direct current is applied to said power supply output means; and control means for controlling said time said alternating current switch means disconnects said alternating current; switch input means from said alternating current switch output means during certain cycles, whereby a selected characteristic of said output direct current power is controlled; said alternating current switch means including a direct current switch having a direct current switch input means and a direct current switch output means and rectifier bridge means for connecting said alternating current switch input means to said direct current switch input means through a first rectifier current path, for connecting said alternating current output means to said direct current switch input means through a second rectifier current path, for connecting said direct current switch output means to said alternating current switch input means through a third rectifier current path and for connecting said direct current switch output means to said alternating current switch output means through a fourth rectifier current path, whereby an alternating current path is formed between said alternating current switch input and output means under the control of said direct switch; said rectifier means including a rectifying voltage multiplier.
Claim 9
Dependent Claim
137 words
A regulated power supply according to claim 6 in which said control means includes: a feedback input means; a feedback output means; said feedback input means being electrically connected to said power supply output means; feedback means for providing a feedback signal to said feedback output means that varies inversely with said selected characteristic of said output direct current power; a timing circuit output means; timing means for applying timing ramp potentials to said timing circuit output means starting between half cycles of said alternating current potential; and comparator means, electrically connected to said feedback output means and said timing circuit output means, for causing said alternating current switch means to disconnect said alternating current switch input means from said alternating current output means when said timing ramp potentials and said feedback signals have a predetermined relationship.
Claim 10
Dependent Claim
234 words
A regulated power supply of the switching-mode class having power supply input means adapted to receive alternating current potential and power supply output means adapted to receive direct current power, comprising: an alternating current switch input means; an alternating current switch output means; alternating current means for applying said alternating current input potential to said alternating current switch input means; alternating current switch means for electrically connecting said alternating current switch input means to said alternating current switch output means at the beginning of at least certain half cycles of said alternating current potential and for disconnecting said alternating current switch input means from the alternating current switch output means at a controlled time during said certain half cycles, whereby beginning portions of said half cycles of alternating current potential are applied to said alternating current switch output means; rectifier means fOr rectifying said beginning portions of said half cycles, whereby direct current is formed; said rectifier means being electrically connected between said alternating current switch output means and said power supply output means, whereby direct current is applied to said power supply output means; and control means for controlling the time said alternating current switch means disconnects said alternating current switch input means from said alternating current switch output means during certain cycles whereby selected characteristics of said output direct current power is controlled; said rectifier means including a full-wave rectifying voltage multiplier.
Claim 11
Dependent Claim
234 words
A regulated power supply of the switching-mode class having power supply input means adapted to receive alternating current potential and power supply output means adapted to receive direct current power, comprising: an alternating current switch input means; an alternating current switch output means; alternating current means for applying said alternating current input potential to said alternating current switch input means; alternating current switch means for electrically connecting said alternating current switch input means to said alternating current switch output means at the beginning of at least certain half cycles of said alternating current potential and for disconnecting said alternating current switch input means from the alternating current switch output means at a controlled time during said certain half cycles, whereby beginning portions of said half cycles of alternating current potential are applied to said alternating current switch output means; rectifier means fOr rectifying said beginning portions of said half cycles, whereby direct current is formed; said rectifier means being electrically connected between said alternating current switch output means and said power supply output means, whereby direct current is applied to said power supply output means; and control means for controlling the time said alternating current switch means disconnects said alternating current switch input means from said alternating current switch output means during certain cycles whereby selected characteristics of said output direct current power is controlled; said rectifier means including a full-wave rectifying voltage multiplier.
Claim 12
Dependent Claim
265 words
A regulated power supply of the switching-mode class having power supply input means adapted to receive alternating current potential and power supply output means adapted to provide direct current power, comprising: an alternating current switch input means; an alternating current switch output means; alternating current means for applying said alternating current input potential to said alternating current switch input means; alternating current switch means for electrically connecting said alternating current switch input means to said alternating current switch output means at the beginning of at least certain half cycles of said alternating current potential and for disconnecting said alternating current switch input means from said alternating current switch output means at a controlled time during said certain cycles, whereby beginning portions of the half cycles of alternating current potential are applied to said alternating current switch output means; rectifier means for rectifying said beginning portions of said half cycles, whereby direct current is formed; rectifier means being electrically connected between said alternating current switch output means and said power supply output means, whereby direct current is applied to said power supply output means; control means for controlling the time said alternating current switch means disconnects said alternating current switch input means from the alternating current switch output means during said certain cycles, whereby a selected characteristic of said output direct current power is controlled; and delay means for controlling the time with respect to the time of the cross-over points of said alternating current potential that said alternating current switch means connects said alternating current switch input means to said alternating current switch output means.
Claim 13
Dependent Claim
265 words
A regulated power supply of the switching-mode class having power supply input means adapted to receive alternating current potential and power supply output means adapted to provide direct current power, comprising: an alternating current switch input means; an alternating current switch output means; alternating current means for applying said alternating current input potential to said alternating current switch input means; alternating current switch means for electrically connecting said alternating current switch input means to said alternating current switch output means at the beginning of at least certain half cycles of said alternating current potential and for disconnecting said alternating current switch input means from said alternating current switch output means at a controlled time during said certain cycles, whereby beginning portions of the half cycles of alternating current potential are applied to said alternating current switch output means; rectifier means for rectifying said beginning portions of said half cycles, whereby direct current is formed; rectifier means being electrically connected between said alternating current switch output means and said power supply output means, whereby direct current is applied to said power supply output means; control means for controlling the time said alternating current switch means disconnects said alternating current switch input means from the alternating current switch output means during said certain cycles, whereby a selected characteristic of said output direct current power is controlled; and delay means for controlling the time with respect to the time of the cross-over points of said alternating current potential that said alternating current switch means connects said alternating current switch input means to said alternating current switch output means.
Claim 14
Dependent Claim
80 words
A regulated power supply according to claim 4 further including means for controlling the slope of said timing ramp potential and for controlling the amplitude range of said feedback signal, whereby said slope and amplitude range may be selected to enable said alternating current switch input means to be connected to said alternating current switch output means for a large portion of each half cycle of said alternating current potential so as to provide good regulation to said power supply.
Claim 15
Dependent Claim
50 words
A regulated power supply according to claim 1 further including delay means for controlling the time with respect to the time of the cross-over points of said alternating current potential that said alternating current switch means connects said alternating current switch input means to said alternating current switch output means.
References Cited (Backward Citations)
US3160808A
Cited
US3202900A
Cited
US3335360A
Cited
US3386024A
Cited
US3363143A
Cited
US3461376A
Cited
US3486105A
Cited
US3538418A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |