Generation of temperature compensated low noise symmetrical refe

Details Generation of temperature compensated low noise symmetrical refe Generation of temperature compensated low noise symmetrical refe

1998-10-19

1999-07-27

Berhane, Adolf Deneke

Electricity: power supply or regulation systems

Self-regulating

Using a three or more terminal semiconductive device as the...

323315, 323316, 323907, G05F 316

Patent

active

059296216

ABSTRACT:
Generation of symmetrical temperature compensated reference voltages in mixed type integrated circuits (digital and analog) having a superior PSRR is provided. Such a circuit includes a voltage-to-current conversion stage of a temperature independent bandgap voltage for producing a differential pair of currents that are applied as inputs to a pair of resistor feedback operational amplifiers. The feedback resistors are integrated in an interlaced form with a resistor employed in the conversion stage so that they have the same thermal gradient. Output of the operational amplifiers provides two temperature compensated low noise symmetrical reference voltages.

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Kumwachara et al., "An Accurate CMOS Differential Voltage-to-Current Converter," International Journal of Electronics, vol. 77, No. 6, Dec. 1, 1994, pp. 1025-1033.

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