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EP0539136A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Voltage generating device

Assignee: Panasonic Holdings Corp
•
Filing: 1992-10-19
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Granted: —
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Expires: 2012-10-19
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Abstract

Abstract A voltage generating device is capable of generating a voltage which does not depend upon temperature even if a power source voltage is not higher than 1.25 V. The device comprises an output terminal (1) thereof, current sources (11 and 15), resistors (13 and 14) and a diode like connected transistor (12). A voltage on the output terminal is obtained by causing a current to flow through series-connected resistors (13 and 14). The current sources are band gap current sources. The current source (15) is assumed as opened. A part of the diode like connected transistor (12) is represented by an equivalent circuit (120) including a voltage source (121) and a resistor (122). The equivalent circuit (120) and the resistors (13 and 14) are represented by an equivalent circuit (130) by using the Thevenin's theorem.

Inventors

  • 👤 Masaharu Ikeda

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-25 02:23
CPC Classifications
G; G05; G05F; G05F3/00; G05F3/02; G05F3/08; G05F3/10; G05F3/16; G05F3/20; G05F3/22; Y; Y10; Y10S; Y10S323/00; Y10S323/907

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 74 words
A voltage generating device comprising: a diode (12); biasing means (11) for generating a forward voltage across the diode (12); voltage dividing means (13, 14) for dividing the forward voltage which is generated by the biasing means; and current generating means (15) for causing a current to flow through a divided voltage output (1) of the voltage dividing means (13, 14), said divided voltage output of said voltage dividing means being an output terminal.
Claim 2
Dependent Claim 40 words
A voltage generating device as defined in Claim 1 in which the current generated by the current generating means is proportional to an absolute temperature and is controlled by a value which is inversely proportional to a current presetting resistance.
Claim 3
Dependent Claim 24 words
A voltage generating device as defined in Claim 1 in which the voltage dividing means (13, 14) is divided into a plurality of resistors.
Claim 4
Dependent Claim 73 words
A voltage generating device as defined in Claim 1 in which the current which is generated by the current generating means (15) is proportional to an absolute temperature and is controlled by a value which is inversely proportional to a current presetting resistor, the voltage dividing means is divided into a plurality of resistors and the thermal coefficient of the current presetting resistor is equal to that of the voltage dividing resistor (7).
Claim 5
Dependent Claim 56 words
A voltage generating device comprising: a diode (12); voltage dividing means (13, 14) for dividing a terminal voltage across the diode; and current generating means (15) for causing a current to flow through a divided voltage output (1) of the voltage dividing means; said divided voltage output of said voltage dividing means being an output terminal.
Claim 6
Dependent Claim 40 words
A voltage generating device as defined in Claim 5 in which the current generated by the current generating means is proportional to an absolute temperature and is controlled by a value which is inversely proportional to a current presetting resistance.
Claim 7
Dependent Claim 22 words
A voltage generating device as defined in Claim 5 in which the voltage dividing means is divided into a plurality of resistors.
Claim 8
Dependent Claim 71 words
A voltage generating device as defined in Claim 5 in which the current which is generated by the current generating means is proportional to an absolute temperature and is controlled by a value which is inversely proportional to a current presetting resistor, the voltage dividing means is divided into a plurality of resistors and the thermal coefficient of the current presetting resistor is equal to that of the voltage dividing resistor.

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