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US 5,396,114 AGranted
Circuit for generating substrate voltage and pumped-up voltage with a single oscillator
AssigneeSamsung Electronics Co., Ltd.
InventorsJae-Heong Lee, Dong-Jae Lee
Life of this patent
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Abstract
A constant voltage generator having a substrate voltage pumping circuit, a voltage pumping circuit and a single oscillator for generating pulses to which the substrate voltage pumping circuit and the voltage pumping circuit are commonly responsive, reducing current consumption of a semiconductor memory device during a stand-by state thereof.
Claims4
A constant voltage generator comprising:
- a substrate voltage pumping circuit, generating a substrate voltage;
- a voltage pumping circuit, generating a supply voltage;
- means for generating pulses to which said substrate voltage pumping circuit and said voltage pumping circuit are commonly responsive;
- a first detector detecting said substrate voltage of said substrate voltage pumping circuit and generating a substrate voltage control signal for controlling operation of said substrate voltage pumping circuit according to results of said detected substrate voltage;
- a second detector detecting said supply voltage of said voltage pumping circuit and generating a pumped-up voltage control signal for controlling operation of said voltage pumping circuit according to results of said detected supply voltage;
- and
- means for receiving said substrate voltage control signal and said pumped-up voltage control signal and generating a pulse control signal, said means for generating pulses being responsive to said pulse control signal.
4 more elements
A constant voltage generator comprising:
- a substrate voltage pumping circuit for generating a substrate voltage;
- a substrate voltage detecting circuit for detecting said substrate voltage output from said substrate voltage pumping circuit and generating a substrate voltage control signal;
- a voltage pumping circuit for generating a pumped-up voltage;
- a pumped-up voltage detecting circuit for detecting the pumped-up voltage output from said voltage pumping circuit and generating a pumped-up voltage control signal;
- an oscillator coupled commonly to said substrate voltage pumping circuit and said voltage pumping circuit, for generating pulses;
- a substrate voltage driving circuit for receiving the pulses output from said oscillator and generating a first driving signal supplied to said substrate voltage pumping circuit in response to said substrate voltage control signal;
- a voltage pumping driving circuit for receiving the pulses output from said oscillator and generating a second driving signal supplied to said voltage pumping circuit in response to said pumped-up voltage control signal;
- and
- means for receiving said substrate voltage control signal and said pumped-up voltage control signal and generating an oscillator control signal, said oscillator being responsive to said oscillator control signal;
- whereby said substrate voltage pumping circuit and said pumping voltage circuit operate independently of each other in response to the pulses output from said single oscillator.
7 more elements
Dependencies are inferred from the claim text.