US5691630A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power supply control apparatus
Assignee: Canon Inc
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Filing: 1995-10-04
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Granted: 1997-11-25
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Expires: 2015-10-04
Abstract
Abstract A power supply control apparatus for controlling a power supply circuit for outputting voltages of at least two systems is constructed by a first power supply circuit for generating a first voltage and a second power supply circuit for generating a second voltage, a controller circuit which is driven by the first voltage, a disconnecting circuit for disconnecting the second voltage by the controller circuit in accordance with a predetermined condition, a power supply controller circuit for controlling the second power supply circuit on the basis of the second voltage, and a supplying circuit for supplying a signal indicative of a state in which the second voltage has been outputted to the power supply controller circuit when the second voltage is disconnected by the disconnecting circuit.
Inventors
- 👤 Takashi Chosa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:25
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/46; G05F1/56; G05F1/577
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
123 words
A power supply control apparatus for controlling a power supply circuit for outputting voltages of at least two systems, comprising: a first power supply circuit for generating a first voltage; a second power supply circuit for generating a second voltage; a controller circuit which is driven by said first voltage; a disconnecting circuit for disconnecting said second voltage by said controller circuit in accordance with a predetermined condition; a power supply controller circuit for controlling said second power supply circuit on the basis of said second voltage; and a supplying circuit for supplying a signal indicative of a state in which said second voltage has been outputted to said power supply controller circuit when said second voltage is disconnected by said disconnecting circuit.
Claim 2
Dependent Claim
123 words
A power supply control apparatus for controlling a power supply circuit for outputting voltages of at least two systems, comprising: a first power supply circuit for generating a first voltage; a second power supply circuit for generating a second voltage; a controller circuit which is driven by said first voltage; a disconnecting circuit for disconnecting said second voltage by said controller circuit in accordance with a predetermined condition; a power supply controller circuit for controlling said second power supply circuit on the basis of said second voltage; and a supplying circuit for supplying a signal indicative of a state in which said second voltage has been outputted to said power supply controller circuit when said second voltage is disconnected by said disconnecting circuit.
Claim 3
Dependent Claim
16 words
An apparatus according to claim 1, wherein said supplying circuit is constructed by a resistor circuit.
Claim 4
Dependent Claim
28 words
An apparatus according to claim 1, wherein said second voltage is shut off after said signal was supplied to said power supply controller circuit by said supplying circuit.
Claim 5
Dependent Claim
113 words
A power supply apparatus having at least two power supply systems, said apparatus comprising: a first power supply circuit for generating a first voltage; a second power supply circuit for generating a second voltage; control means for controlling said first and second power supply circuits based on the first and second voltages generated by said first and second power supply circuits, respectively; making means for making said second power supply circuit inoperative; and signal supply means for supplying a signal to said control means when said making means is to make said second power supply circuit inoperative, the signal being indicative of a state as if said second power supply circuit were operative.
Claim 6
Dependent Claim
113 words
A power supply apparatus having at least two power supply systems, said apparatus comprising: a first power supply circuit for generating a first voltage; a second power supply circuit for generating a second voltage; control means for controlling said first and second power supply circuits based on the first and second voltages generated by said first and second power supply circuits, respectively; making means for making said second power supply circuit inoperative; and signal supply means for supplying a signal to said control means when said making means is to make said second power supply circuit inoperative, the signal being indicative of a state as if said second power supply circuit were operative.
Claim 7
Dependent Claim
15 words
An apparatus according to claim 4, wherein said signal supply means comprises a resistor circuit.
Claim 8
Dependent Claim
30 words
An apparatus according to claim 4, wherein said making means makes said second power supply circuit inoperative after said signal supply means has supplied the signal to said control means.
Claim 9
Dependent Claim
112 words
A power supply control method of controlling a power supply circuit for outputting voltages of at least two systems, comprising the steps of: generating a first voltage by a first power supply circuit; generating a second voltage by a second power supply circuit; driving a controller circuit responsive to the first voltage; disconnecting the second voltage by the controller circuit according to a predetermined condition; controlling the second power supply circuit on the basis of the second voltage by a power supply control circuit; and supplying a signal indicative of a state in which the second voltage has been outputted to the power supply control circuit when the second voltage is disconnected.
Claim 10
Dependent Claim
112 words
A power supply control method of controlling a power supply circuit for outputting voltages of at least two systems, comprising the steps of: generating a first voltage by a first power supply circuit; generating a second voltage by a second power supply circuit; driving a controller circuit responsive to the first voltage; disconnecting the second voltage by the controller circuit according to a predetermined condition; controlling the second power supply circuit on the basis of the second voltage by a power supply control circuit; and supplying a signal indicative of a state in which the second voltage has been outputted to the power supply control circuit when the second voltage is disconnected.
Claim 11
Dependent Claim
16 words
The method of claim 7, wherein the state indicative signal is supplied by a resistor circuit.
Claim 12
Dependent Claim
28 words
The method of claim 7, further comprising the step of shutting off the second voltage after the state indicative signal is supplied to the power supply controller circuit.
Claim 13
Dependent Claim
96 words
A power supply control method of controlling a power supply apparatus having at least two power supply systems, comprising the steps of: generating a first voltage by a first power supply circuit; generating a second voltage by a second power supply circuit; controlling the first and second power supply circuits based on the first and second voltages; making the second power supply inoperative; supplying a signal indicative of a state as if the second power supply circuit were operative to control the first and second power supply circuits when the second power supply is made inoperative.
Claim 14
Dependent Claim
96 words
A power supply control method of controlling a power supply apparatus having at least two power supply systems, comprising the steps of: generating a first voltage by a first power supply circuit; generating a second voltage by a second power supply circuit; controlling the first and second power supply circuits based on the first and second voltages; making the second power supply inoperative; supplying a signal indicative of a state as if the second power supply circuit were operative to control the first and second power supply circuits when the second power supply is made inoperative.
Claim 15
Dependent Claim
20 words
A power supply control method according to claim 10, wherein the state indicative signal is supplied by a resistor circuit.
Claim 16
Dependent Claim
26 words
A power supply control method according to claim 10, wherein the second power supply circuit is made inoperative after the state indicative signal has been supplied.
References Cited (Backward Citations)
US4163906A
Cited
US5202725A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-11-24 | 2001-05-26 | 2001-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-11-24 | 2005-05-26 | 2005-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-11-24 | 2009-05-26 | 2009-11-25 | $7700.00 | Window Closed / Lapsed |