EP 1011801 A1 20000628 - 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
Application
Priority
- US 9800954 W 19980116
- US 79047097 A 19970129
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
IPC 8 full level
CPC (source: EP)
A61N 1/3706 (2013.01); G05F 3/245 (2013.01)
Citation (search report)
See references of WO 9832490A1
Designated contracting state (EPC)
AT BE CH DE FR GB IE IT LI NL
DOCDB simple family (publication)
WO 9832490 A1 19980730; CA 2278498 A1 19980730; EP 1011801 A1 20000628
DOCDB simple family (application)
US 9800954 W 19980116; CA 2278498 A 19980116; EP 98902622 A 19980116