JPS621194A - Semiconductor device - Google Patents

Semiconductor device

Info

Publication number
JPS621194A
JPS621194A JP13963485A JP13963485A JPS621194A JP S621194 A JPS621194 A JP S621194A JP 13963485 A JP13963485 A JP 13963485A JP 13963485 A JP13963485 A JP 13963485A JP S621194 A JPS621194 A JP S621194A
Authority
JP
Japan
Prior art keywords
constant voltage
voltage
logic
range
eeprom
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP13963485A
Other languages
Japanese (ja)
Inventor
Yasushi Terada
Takeshi Nakayama
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP13963485A priority Critical patent/JPS621194A/en
Publication of JPS621194A publication Critical patent/JPS621194A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To obtain an optimum write voltage to an EEPROM in any case by installing and using plural types of constant voltage sources.
CONSTITUTION: Constant voltage sources 1:21, 2:72,......n:7n outputting different voltages are provided by segmenting a range from a minimum voltage assumed to be necessary to a maximum one assumed to be necessary into appropriate steps. As a result, the constant voltage source outputting an appropriate voltage in correspondence to the range can be selected within the variable range where the optimum value of the write voltage Vpp to the EEPROM lies. Moreover the operation of said selection is extremely easy. A shift register 8 is so constituted that only one bit is of logic '1' and the remainder are of logic '0'. The bit of the logic '1' is shifted, and connected so that and a voltage from the constant voltage source corresponding to the position can be connected so as to input to a waveform shaping circuit 6. Accordingly the shift operation of the shift register 8 is sufficient for switching the constant voltage source.
COPYRIGHT: (C)1987,JPO&Japio
JP13963485A 1985-06-26 1985-06-26 Semiconductor device Pending JPS621194A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13963485A JPS621194A (en) 1985-06-26 1985-06-26 Semiconductor device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13963485A JPS621194A (en) 1985-06-26 1985-06-26 Semiconductor device

Publications (1)

Publication Number Publication Date
JPS621194A true JPS621194A (en) 1987-01-07

Family

ID=15249847

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13963485A Pending JPS621194A (en) 1985-06-26 1985-06-26 Semiconductor device

Country Status (1)

Country Link
JP (1) JPS621194A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001202799A (en) * 1999-11-17 2001-07-27 Motorola Inc Measurement for threshold voltage distribution of memory array bit cell in circuit
JP2011165312A (en) * 2011-04-18 2011-08-25 Toshiba Corp Semiconductor memory device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001202799A (en) * 1999-11-17 2001-07-27 Motorola Inc Measurement for threshold voltage distribution of memory array bit cell in circuit
JP2011165312A (en) * 2011-04-18 2011-08-25 Toshiba Corp Semiconductor memory device

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