WO2006023145A3 - Oscillator circuit for eeprom high voltage generator - Google Patents

Oscillator circuit for eeprom high voltage generator Download PDF

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Publication number
WO2006023145A3
WO2006023145A3 PCT/US2005/024178 US2005024178W WO2006023145A3 WO 2006023145 A3 WO2006023145 A3 WO 2006023145A3 US 2005024178 W US2005024178 W US 2005024178W WO 2006023145 A3 WO2006023145 A3 WO 2006023145A3
Authority
WO
WIPO (PCT)
Prior art keywords
voltage
high voltage
eeprom
oscillator circuit
oscillator frequency
Prior art date
Application number
PCT/US2005/024178
Other languages
French (fr)
Other versions
WO2006023145A2 (en
Inventor
Stephane Ricard
Marc Merandat
Jerome Pratlong
Sylvie B Vergnes
Laureline Bour
Original Assignee
Atmel 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
Priority claimed from FR0408931A external-priority patent/FR2874467B1/en
Application filed by Atmel Corp filed Critical Atmel Corp
Publication of WO2006023145A2 publication Critical patent/WO2006023145A2/en
Publication of WO2006023145A3 publication Critical patent/WO2006023145A3/en

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C16/00—Erasable programmable read-only memories
    • G11C16/02—Erasable programmable read-only memories electrically programmable
    • G11C16/06—Auxiliary circuits, e.g. for writing into memory
    • G11C16/30—Power supply circuits
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
    • H03K3/023—Generators characterised by the type of circuit or by the means used for producing pulses by the use of differential amplifiers or comparators, with internal or external positive feedback
    • H03K3/0231—Astable circuits

Landscapes

  • Dc-Dc Converters (AREA)
  • Read Only Memory (AREA)

Abstract

A semiconductor oscillator circuit for an EEPROM high voltage charge pump utilizes a current generating means (70) to charge a first (78) and a second (82) capacitor alternatively. The charging current (Id) produced by the current generating means is inversely proportional to the ambient temperature. The charging current is proportional to the supply voltage (Vdd) and consequently, the oscillator frequency output remains constant over a variable voltage supply. Such a constant frequency characteristic makes a low voltage operation possible, but slows down the oscillator frequency as temperature increases. The slowing of oscillator frequency limits the charge pump output voltage and enhances the lifespan of the EEPROM cells.
PCT/US2005/024178 2004-08-17 2005-07-11 Oscillator circuit for eeprom high voltage generator WO2006023145A2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR0408931A FR2874467B1 (en) 2004-08-17 2004-08-17 CIRCUIT FOR A HIGH VOLTAGE EEPROM GENERATOR
IT04/08931 2004-08-17
US10/995,458 US7132902B2 (en) 2004-08-17 2004-11-22 Oscillator circuit for EEPROM high voltage generator
US10/995,458 2004-11-22

Publications (2)

Publication Number Publication Date
WO2006023145A2 WO2006023145A2 (en) 2006-03-02
WO2006023145A3 true WO2006023145A3 (en) 2006-05-04

Family

ID=35968027

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2005/024178 WO2006023145A2 (en) 2004-08-17 2005-07-11 Oscillator circuit for eeprom high voltage generator

Country Status (1)

Country Link
WO (1) WO2006023145A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2994750B1 (en) 2012-08-23 2015-12-11 St Microelectronics Rousset SUPPLYING A FLOATING POTENTIAL LOAD

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4340924A1 (en) * 1993-12-01 1995-06-08 Telefunken Microelectron Frequency-stabilised RC oscillator for clock generator circuit
EP0901127A2 (en) * 1997-09-04 1999-03-10 Siemens Aktiengesellschaft Temperature independent oscillator

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4340924A1 (en) * 1993-12-01 1995-06-08 Telefunken Microelectron Frequency-stabilised RC oscillator for clock generator circuit
EP0901127A2 (en) * 1997-09-04 1999-03-10 Siemens Aktiengesellschaft Temperature independent oscillator

Also Published As

Publication number Publication date
WO2006023145A2 (en) 2006-03-02

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