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Registered LOW-VOLTAGE BAND-GAP REFERENCE VOLTAGE BIAS CIRCUIT

저전압 밴드갭 기준전압 발생기
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Inventors
Young Ho Kim, Park Seong Su
Application No.
11945708 (2007.11.27)
Publication No.
20080136504 (2008.06.12)
Registration No.
7808305 (2010.10.05)
Country
UNITED STATES
Project Code
06MB1800, Integrated Development of UltraLow Power RF/HW/SW SoC, Seok Bong Hyun
Abstract
A low-voltage band-gap reference voltage bias circuit is provided. In the low-voltage band-gap reference voltage bias circuit, a proportional-to-absolute temperature (PTAT) current is copied to two nodes, respectively, to generate a first voltage having a negative slope with respect to temperature variation, and a second voltage having a positive slope with respect to temperature variation, and first and second elements having high impedances are serially connected to each other between the two nodes, such that the sum of the negative slope of the first voltage and the positive slope of the second voltage is zero and an average voltage between the two nodes is extracted to output the extracted result as a reference voltage. Accordingly, a stable reference voltage of 1V or lower regardless of a power supply voltage and temperature variation can be supplied.
KSP Keywords
Absolute temperature, Average Voltage, Band gap, Band-gap reference voltage, Bandgap Reference, Positive slope, Supply voltage, Temperature variations, Voltage band, Voltage bias circuit, bias circuit, low voltage, power supply, process-voltage-temperature(PVT), reference voltage, voltage bias