Global Patent Index - EP 1011801 A1

EP 1011801 A1 2000-06-28 - CURRENT AND TEMPERATURE COMPENSATED VOLTAGE REFERENCE

Title (en)

CURRENT AND TEMPERATURE COMPENSATED VOLTAGE REFERENCE

Title (de)

STROM- UND TEMPERATURKOMPENSIERTE SPANNUNGSREFERENZ

Title (fr)

REFERENCE DE TENSION COMPENSEE EN COURANT ET EN TEMPERATURE

Publication

EP 1011801 A1 (EN)

Application

EP 98902622 A

Priority

  • US 9800954 W
  • US 79047097 A

Abstract (en)

[origin: WO9832490A1] A current and temperature compensated voltage reference circuit operates from a power supply voltage as low as approximately 1.3 Volts. A current reference circuit uses a folded-cascode amplifier to measure the temperature dependent voltages provided by first and second bias circuits, each of which includes two series-coupled diodes or diode-connected bipolar junction transistors (BJTs), and provides a proportional to absolute temperature (PTAT) current in response thereto. A voltage reference circuit uses a PTAT current through a resistor to create a PTAT voltage in series with a diode-voltage, and the resistor value is adjusted until the sum of these voltages is approximately equal to the bandgap voltage of silicon, thereby providing a temperature compensated voltage reference. The reference circuit is suitable for use with an implantable cardiac rythm management system having a battery that provides a power supply voltage approximately between 1.3 Volts and 3.25 Volts.

IPC 1-7 (main, further and additional classification)

A61N 1/37

IPC 8 full level (invention and additional information)

A61N 1/37 (2006.01); G05F 3/24 (2006.01)

CPC (invention and additional information)

G05F 3/245 (2013.01); A61N 1/3706 (2013.01)

Citation (search report)

See references of WO 9832490A1

Designated contracting state (EPC)

AT BE CH DE FR GB IE IT LI NL

EPO simple patent family

WO 9832490 A1 19980730; CA 2278498 A1 19980730; EP 1011801 A1 20000628

INPADOC legal status


2001-11-07 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20010424

2000-11-29 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20001012

2000-06-28 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19990823

2000-06-28 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH DE FR GB IE IT LI NL