EP0774705A3 - Comparator with hysteresis for use in a voltage regulating circuit - Google Patents

Comparator with hysteresis for use in a voltage regulating circuit Download PDF

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Publication number
EP0774705A3
EP0774705A3 EP96118126A EP96118126A EP0774705A3 EP 0774705 A3 EP0774705 A3 EP 0774705A3 EP 96118126 A EP96118126 A EP 96118126A EP 96118126 A EP96118126 A EP 96118126A EP 0774705 A3 EP0774705 A3 EP 0774705A3
Authority
EP
European Patent Office
Prior art keywords
load transistor
comparator
hysteresis
regulating circuit
voltage regulating
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.)
Granted
Application number
EP96118126A
Other languages
German (de)
French (fr)
Other versions
EP0774705B1 (en
EP0774705A2 (en
Inventor
Udo John
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
STMicroelectronics GmbH
Original Assignee
SGS Thomson Microelectronics GmbH
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 SGS Thomson Microelectronics GmbH filed Critical SGS Thomson Microelectronics GmbH
Publication of EP0774705A2 publication Critical patent/EP0774705A2/en
Publication of EP0774705A3 publication Critical patent/EP0774705A3/en
Application granted granted Critical
Publication of EP0774705B1 publication Critical patent/EP0774705B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F3/00—Non-retroactive systems for regulating electric variables by using an uncontrolled element, or an uncontrolled combination of elements, such element or such combination having self-regulating properties
    • G05F3/02—Regulating voltage or current
    • G05F3/08—Regulating voltage or current wherein the variable is dc
    • G05F3/10—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics
    • G05F3/16—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics being semiconductor devices
    • G05F3/20—Regulating voltage or current wherein the variable is dc using uncontrolled devices with non-linear characteristics being semiconductor devices using diode- transistor combinations
    • G05F3/26—Current mirrors
    • G05F3/267—Current mirrors using both bipolar and field-effect technology

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Nonlinear Science (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Electronic Switches (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Dc-Dc Converters (AREA)

Abstract

Hysteresebehaftete Komparatorschaltung, die zur praktisch leistungslosen Erfassung des einem Vergleich zu unterziehenden Spannungswertes eine Differenzstufe (D) verwendet, die einen Endes Lasttransistoren (MN1, MP1) und anderen Endes eine Gegenkopplungsstufe (G) und vorzugsweise eine Stromspiegelstufe (S) verwendet. Der Steuerelektrode des einen Lasttransistors (MN1) wird die dem Vergleich zuzuführende Spannung geliefert. Der Steuerelektrode des anderen Lasttransistors (MP1) wird eine Referenzspannung zugeführt, aufgrund welcher dieser Lasttransistor (MP1) eine konstante Lastimpedanz darstellt. Dem zweiten Lasttransistor (MP1) ist ein dritter Lasttransistor (MP2) parallel geschaltet, der in Abhängigkeit von dem Ausgangssignal des Komparators leitet oder sperrt, so daß der Impedanz des zweiten Lasttransistors (MP1) in Abhängigkeit vom Ausgangssignal des Komparators eine weitere Lastimpedanz parallel geschaltet wird oder nicht.

Figure 00000001
Hysteresis comparator circuit which uses a differential stage (D) for practically powerless detection of the voltage value to be subjected to comparison, which uses one end of the load transistor (MN1, MP1) and the other end a negative feedback stage (G) and preferably a current mirror stage (S). The control electrode of the one load transistor (MN1) is supplied with the voltage to be supplied for the comparison. A reference voltage is fed to the control electrode of the other load transistor (MP1), on the basis of which this load transistor (MP1) represents a constant load impedance. A third load transistor (MP2) is connected in parallel to the second load transistor (MP1), which conducts or blocks in dependence on the output signal of the comparator, so that the impedance of the second load transistor (MP1) is connected in parallel in dependence on the output signal of the comparator or not.
Figure 00000001
EP96118126A 1995-11-16 1996-11-12 Comparator with hysteresis for use in a voltage regulating circuit Expired - Lifetime EP0774705B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19542823 1995-11-16
DE19542823A DE19542823C2 (en) 1995-11-16 1995-11-16 Hysteresis comparator circuit for use in a voltage regulation circuit

Publications (3)

Publication Number Publication Date
EP0774705A2 EP0774705A2 (en) 1997-05-21
EP0774705A3 true EP0774705A3 (en) 1998-01-28
EP0774705B1 EP0774705B1 (en) 2003-07-23

Family

ID=7777670

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96118126A Expired - Lifetime EP0774705B1 (en) 1995-11-16 1996-11-12 Comparator with hysteresis for use in a voltage regulating circuit

Country Status (3)

Country Link
US (1) US5739705A (en)
EP (1) EP0774705B1 (en)
DE (1) DE19542823C2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1209793A1 (en) * 2000-11-23 2002-05-29 Semiconductor Components Industries LLC Apparatus and method for controlling a power supply
KR100433362B1 (en) * 2002-07-11 2004-06-07 에이디반도체(주) Impedance comparator integrated circuits
US7646115B2 (en) * 2007-01-05 2010-01-12 Standard Microsystems Corporation Regulator circuit with multiple supply voltages
US9356587B2 (en) * 2014-02-19 2016-05-31 Stmicroelectronics S.R.L. High voltage comparison circuit
JP6498649B2 (en) * 2016-10-17 2019-04-10 株式会社東海理化電機製作所 Level shifter

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3723579C1 (en) * 1987-07-16 1989-02-16 Sgs Halbleiterbauelemente Gmbh Longitudinal voltage regulator
JPH03248616A (en) * 1990-02-27 1991-11-06 Seiko Instr Inc Comparator circuit
EP0623997A1 (en) * 1993-05-07 1994-11-09 STMicroelectronics S.r.l. Hysteresis comparator working with a low voltage supply

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3938055A (en) * 1975-01-17 1976-02-10 Aeronutronic Ford Corporation (Formerly Philco-Ford Corporation) High performance differential amplifier
US4259601A (en) * 1978-12-08 1981-03-31 Motorola, Inc. Comparison circuit having bidirectional hysteresis
JPS55144437U (en) * 1979-04-05 1980-10-16
CA1203290A (en) * 1982-04-28 1986-04-15 Yoshio Shimizu Signal comparing circuit
JPS58202613A (en) * 1982-05-21 1983-11-25 Nec Corp Differential amplifying circuit
JPH04196812A (en) * 1990-11-28 1992-07-16 Fujitsu Ltd Level converter
FR2719135B1 (en) * 1994-04-21 1996-06-28 Sgs Thomson Microelectronics Voltage limiting circuit with hysteresis comparator.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3723579C1 (en) * 1987-07-16 1989-02-16 Sgs Halbleiterbauelemente Gmbh Longitudinal voltage regulator
JPH03248616A (en) * 1990-02-27 1991-11-06 Seiko Instr Inc Comparator circuit
EP0623997A1 (en) * 1993-05-07 1994-11-09 STMicroelectronics S.r.l. Hysteresis comparator working with a low voltage supply

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
"Fast MOSTEK ROM has 350-ns access", ELECTRONICS, vol. 49, no. 19, 16 September 1976 (1976-09-16), pages 42,44, XP002047259 *
PATENT ABSTRACTS OF JAPAN vol. 016, no. 045 (E - 1162) 5 February 1992 (1992-02-05) *

Also Published As

Publication number Publication date
EP0774705B1 (en) 2003-07-23
EP0774705A2 (en) 1997-05-21
DE19542823A1 (en) 1997-05-22
DE19542823C2 (en) 1997-09-04
US5739705A (en) 1998-04-14

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