EP0072842A4 - Dispositif de decalage du niveau du coefficient de temperature variable. - Google Patents

Dispositif de decalage du niveau du coefficient de temperature variable.

Info

Publication number
EP0072842A4
EP0072842A4 EP19820900756 EP82900756A EP0072842A4 EP 0072842 A4 EP0072842 A4 EP 0072842A4 EP 19820900756 EP19820900756 EP 19820900756 EP 82900756 A EP82900756 A EP 82900756A EP 0072842 A4 EP0072842 A4 EP 0072842A4
Authority
EP
European Patent Office
Prior art keywords
temperature coefficient
current
voltage
generating
supply voltage
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.)
Withdrawn
Application number
EP19820900756
Other languages
German (de)
English (en)
Other versions
EP0072842A1 (fr
Inventor
Byron G Bynum
Randall C Gray
Robert B Jarrett
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.)
Motorola Solutions Inc
Original Assignee
Motorola Inc
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 Motorola Inc filed Critical Motorola Inc
Publication of EP0072842A1 publication Critical patent/EP0072842A1/fr
Publication of EP0072842A4 publication Critical patent/EP0072842A4/fr
Withdrawn legal-status Critical Current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
    • G05F3/30—Regulators using the difference between the base-emitter voltages of two bipolar transistors operating at different current densities

Definitions

  • This invention relates generally to a voltage level shifter and, more particularly, to a circuit for generating a voltage having an independently controllable temperature coefficient and amplitude.
  • a level shifting circuit for producing an output voltage having a desired amplitude and temperature coefficient, comprising: a first supply voltage terminal; a second supply voltage terminal; a first current source coupled to said first supply voltage terminal for generating a first current having a positive temperature coefficients a second current source coupled to said first supply voltage terminal for generating a second current having a negative temperature coefficient; and first resistive means coupled between said first and second current sources and said second supply voltage terminal for combining, said first and second currents to produce a third current having a net temperature coefficient corresponding to said desired temperature coefficient and for generating from said third current a voltage having said net temperature coefficient, said voltage having said desired amplitude.
  • a method for level shifting a voltage comprising: generating a first current having a positive temperature coefficient; generating a second current having a negative temperature coefficient; varying the magnitude of said first and second currents to achieve a net negative, zero, or positive temperature coefficient; and applying the sum of said first and second currents to a first resistive means the resistance of which being chosen to produce a required level shift.
  • the inventive arrangement shown in the drawing includes first and second resistors R N and R P coupled between ground and nodes 4 and 6 respectively.
  • a third resistor R S is coupled to a source of supply voltage (V+) and to node 2 from which the circuit output is taken.
  • Block 8 which is coupled to nodes 2, 4, and 6 as shown includes circuitry for generating a first voltage V BE and a second voltage ⁇ V BE , V BE corresponding to the base-emitter voltage of a transistor and having a negative temperature coefficient, and ⁇ V BE being the base-toemitter voltage differential between a pair of transistor and having a positive temperature coefficient. Circuits for generating these voltages are well-known and a further description is not deemed necessary here.
  • Resistors R N , R P and R S may be internal to an integrated circuit chip or external thereto.
  • V BE appearing at node 4
  • the current flowing through R N has a negative temperature coefficient and a value of V BE /R N .
  • ⁇ V BE appearing at node 6
  • the current flowing through R P has a positive temperature coefficient associated therewith and a value of ⁇ V BE /R P .
  • the total current flowing through resistor R S (I CNT equals V BE /R N plus ⁇ V BE /R P ). This current has a net temperature coefficient associated with it which is controlled by properly selecting resistors Rpj and R P .
  • the temperature coefficient of I CNT is totally due to the ⁇ V BE component and is therefore positive. If, on the other hand, R P is open, the temperature coefficient of I CNT is due to the V BE term and is therefore negative.
  • the temperature coefficient of I CNT may be varied from approximately -2800 parts-per-million to +3000 parts-per-million.
  • the magnitude of the level shift appearing at node 2 can be set to some desired magnitude by properly selecting resistor R S .
  • the voltage drop across R S will now have the same temperature coefficient associated therewith as was imparted to the control current I CNT .
  • a voltage source has been created which has a controllable temperature coefficient and an independently controlled magnitude. That is, temperature coefficient is controlled by selecting R N and R P , and the magnitude of the shift is controlled by selecting R S .

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Nonlinear Science (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Amplifiers (AREA)
  • Logic Circuits (AREA)
  • Control Of Electrical Variables (AREA)
EP19820900756 1981-02-20 1982-01-25 Dispositif de decalage du niveau du coefficient de temperature variable. Withdrawn EP0072842A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US23609181A 1981-02-20 1981-02-20
US236091 1988-08-24

Publications (2)

Publication Number Publication Date
EP0072842A1 EP0072842A1 (fr) 1983-03-02
EP0072842A4 true EP0072842A4 (fr) 1984-04-06

Family

ID=22888107

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820900756 Withdrawn EP0072842A4 (fr) 1981-02-20 1982-01-25 Dispositif de decalage du niveau du coefficient de temperature variable.

Country Status (4)

Country Link
EP (1) EP0072842A4 (fr)
JP (1) JPH0664504B2 (fr)
IT (1) IT1147597B (fr)
WO (1) WO1982002964A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4902959A (en) * 1989-06-08 1990-02-20 Analog Devices, Incorporated Band-gap voltage reference with independently trimmable TC and output
GB2355552A (en) 1999-10-20 2001-04-25 Ericsson Telefon Ab L M Electronic circuit for supplying a reference current

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2339719A1 (fr) * 1976-01-28 1977-08-26 Strathclyde Precast Concrete L Methode pour faire un revetement sur des blocs de construction
DE3006598A1 (de) * 1980-02-22 1981-08-27 Robert Bosch Gmbh, 7000 Stuttgart Spannungsquelle

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US30586A (en) * 1860-11-06 Dooe-lock
US3781648A (en) * 1973-01-10 1973-12-25 Fairchild Camera Instr Co Temperature compensated voltage regulator having beta compensating means
US4079308A (en) * 1977-01-31 1978-03-14 Advanced Micro Devices, Inc. Resistor ratio circuit construction
JPS5574615A (en) * 1978-11-30 1980-06-05 Toshiba Corp Constant voltage circuit
JPS564817A (en) * 1979-06-25 1981-01-19 Hitachi Ltd Constant voltage generating circuit
US4263519A (en) * 1979-06-28 1981-04-21 Rca Corporation Bandgap reference
US4317054A (en) * 1980-02-07 1982-02-23 Mostek Corporation Bandgap voltage reference employing sub-surface current using a standard CMOS process

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2339719A1 (fr) * 1976-01-28 1977-08-26 Strathclyde Precast Concrete L Methode pour faire un revetement sur des blocs de construction
DE3006598A1 (de) * 1980-02-22 1981-08-27 Robert Bosch Gmbh, 7000 Stuttgart Spannungsquelle

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IEEE JOURNAL OF SOLID-STATE CIRCUITS, Band SC-11, no. 6, December 1976, NEW YORK (US) *

Also Published As

Publication number Publication date
JPS58500092A (ja) 1983-01-13
JPH0664504B2 (ja) 1994-08-22
IT1147597B (it) 1986-11-19
EP0072842A1 (fr) 1983-03-02
IT8247745A0 (it) 1982-02-08
WO1982002964A1 (fr) 1982-09-02

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19821012

AK Designated contracting states

Designated state(s): DE FR GB NL

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19861111

RIN1 Information on inventor provided before grant (corrected)

Inventor name: JARRETT, ROBERT B.

Inventor name: BYNUM, BYRON G.

Inventor name: GRAY, RANDALL C.