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...http://www.google.de/patents/US5929621?utm_source=gb-gplus-sharePatent US5929621 - Generation of temperature compensated low noise symmetrical reference voltages
