EP0023124A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Power source device for bubble memory unit
Assignee: Fanuc Corp
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Filing: 1980-07-16
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Granted: —
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Expires: 2000-07-16
Abstract
Abstract The power source device 3 has a first DC power source circuit 12 for supplying a DC voltage Ec for control circuitry 2 of bubble memory unit 1, a second DC power source circuit 13 for supplying a voltage Ed for drive circuitry of the unit 1, and also supplies a memory enable signal Me for the unit 1. A comparator 14 compares Ec with a reference level Vm. Source circuit 13 is actuated at a given delay time after Ec exceeds Vm whereafter Me is produced. When Ec falls below Vm, Me is cancelled immediately and source circuit 13 is switched off after a time delay.
Inventors
- 👤 Ryoji Imazeki
- 👤 Masayuki Hattori
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 22:46
CPC Classifications
G; G11; G11C; G11C19/00; G11C19/02; G11C19/08; G11C19/085; G06; G06F; G06F1/00; G06F1/26; H; H02; H02H; H02H3/00; H02H3/24; H02H3/247
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
242 words
A bubble memory unit power source device for supplying a first DC voltage signal E c which is applied to control circuitry for controlling the reading and writing of data, a second DC voltage signal E d which is applied to drive circuitry for driving a bubble memory element, and a memory enable signal M e which enables data to be written in the bubble memory element or read out therefrom, said signals E c , E d and M e being made to rise and fall according to a prescribed sequence as a commercial power supply is connected and disconnected, said power source device comprising: a first DC power source circuit for producing said first DC voltage signal E C ; a second DC power source circuit for producing said second DC voltage signal E d ; a signal generating circuit for generating said memory enable signal M e ; a comparator circuit for comparing the magnitude of said first DC voltage signal E c with a re-ference level V M ; and a delay circuit; wherein in the case that the commercial power supply has been connected, after the lapse of a time delay since the magnitude of signal E c surpasses the reference level V M , said delay circuit produces a power enable signal P e , which actuates said second DC power source circuit and thereafter said signal generating circuit generates memory enable signal M e .
Claim 2
Dependent Claim
242 words
A bubble memory unit power source device for supplying a first DC voltage signal E c which is applied to control circuitry for controlling the reading and writing of data, a second DC voltage signal E d which is applied to drive circuitry for driving a bubble memory element, and a memory enable signal M e which enables data to be written in the bubble memory element or read out therefrom, said signals E c , E d and M e being made to rise and fall according to a prescribed sequence as a commercial power supply is connected and disconnected, said power source device comprising: a first DC power source circuit for producing said first DC voltage signal E C ; a second DC power source circuit for producing said second DC voltage signal E d ; a signal generating circuit for generating said memory enable signal M e ; a comparator circuit for comparing the magnitude of said first DC voltage signal E c with a re-ference level V M ; and a delay circuit; wherein in the case that the commercial power supply has been connected, after the lapse of a time delay since the magnitude of signal E c surpasses the reference level V M , said delay circuit produces a power enable signal P e , which actuates said second DC power source circuit and thereafter said signal generating circuit generates memory enable signal M e .
Claim 3
Dependent Claim
56 words
The power source device according to claim 1, in which a rapid discharge circuit is connected across-the output terminals of said second DC power source circuit, said rapid discharge circuit being operational until the power enable signal P e is produced, and being rendered non-operational by the production of the power enable signal P e .
Claim 4
Dependent Claim
45 words
The power source device according to claim 1 or claim 2, in which the reference level V M is set to a value intermediate a set value V N of the first DC voltage E c and an allowable lower limit voltage V L .
Claim 5
Dependent Claim
191 words
The power source device according to claim 1 or claim 2, in which said second DC power source circuit includes a first rectifier for rectifying an input AC voltage; a power transistor which is controlled to be on and off and generates voltage signal having rectangular waveform; pulse width modulator for modulating said voltage signal by making the power transistor turn on and off; a second rectifier for rectifying the voltage signal which has been pulse-width modulated by said pulse width modulator; a comparator for comparing the magnitudes of the output voltage from said second rectifier and a reference voltage and for actuating said pulse width modulator based upon the result of the comparison; and a gate circuit for gating output of said pulse width modulator so as to turn off said power transistor; said gate circuit responding to the generation of the power enable signal P e to pass the output of the pulse width modulator, whereby said power transistor is turned on or off in accordance with the output of the pulse width modulator to control the output of the DC voltage signal E d from said second rectifier.
Claim 6
Dependent Claim
216 words
A bubble memory unit power source device for supplying a first DC voltage signal E c which is applied to control circuitry for controlling the reading and writing of data, a second DC voltage signal E d which is applied to drive circuitry for driving a bubble memory element, and a memory enable signal M e which enables data to be written in the bubble memory element or read out therefrom, said signals E c , E d and M e being made to rise and fall according to a prescribed sequence as a commercial power supply is connected and disconnected, said power source device comprising:. a first DC power source circuit for producing said first DC voltage signal E c ; a second DC power source circuit for producing said second DC voltage E d ; a comparator circuit for comparing the magnitude of said first DC voltage signal E c with a reference level V M ; and a delay circuit; the memory enable signal M e vanishing immediately when the value of signal E c drops, below the reference potential Vm at the time that the commercial power supply is disconnected; said second DC power source circuit being rendered non-operative a prescribed period of time after the memory enable signal M e vanishes.
Claim 7
Dependent Claim
216 words
A bubble memory unit power source device for supplying a first DC voltage signal E c which is applied to control circuitry for controlling the reading and writing of data, a second DC voltage signal E d which is applied to drive circuitry for driving a bubble memory element, and a memory enable signal M e which enables data to be written in the bubble memory element or read out therefrom, said signals E c , E d and M e being made to rise and fall according to a prescribed sequence as a commercial power supply is connected and disconnected, said power source device comprising:. a first DC power source circuit for producing said first DC voltage signal E c ; a second DC power source circuit for producing said second DC voltage E d ; a comparator circuit for comparing the magnitude of said first DC voltage signal E c with a reference level V M ; and a delay circuit; the memory enable signal M e vanishing immediately when the value of signal E c drops, below the reference potential Vm at the time that the commercial power supply is disconnected; said second DC power source circuit being rendered non-operative a prescribed period of time after the memory enable signal M e vanishes.
Claim 8
Dependent Claim
39 words
The power source device according to claim 5, in which a rapid discharge circuit is connected across the output terminals of said second DC power source circuit, said rapid discharge circuit being rendered operational after said prescribed time delay.
Claim 9
Dependent Claim
160 words
The power source device according to claim 5 or claim 6, in which said second DC power source circuit includes a first rectifier for rectifying an input AC voltage; a power transistor which is controlled to be on and off and generates voltage signal having rectangular waveform; pulse width modulator for modulating said voltage signal by making the power transistor turn on and off; a second rectifier for rectifying the voltage signal which has been pulse-width modulated by said pulse width modulator; a comparator for comparing the magnitudes of the output voltage from said second rectifier and a reference voltage and for actuating said pulse width modulator based upon the result of the comparison; and a gate circuit for gating output of said pulse width modulator so as to turn off said power transistor; said gate circuit being closed after said prescribed time delay to block the output of said pulse width modulator, whereby said power transistor is turned off.
Claim 10
Dependent Claim
45 words
The power source device according to claim 5 or claim 6, in which the reference level V M is set to a value intermediate a set value V N of the first DC voltage E c and an allowable lower limit voltage V L .
References Cited (Backward Citations)
No citation records indexed.
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