A current processing circuit having reduced charge and discharge time constant errors caused by variations in operating temperature and voltage while conveying charge and discharge currents to and from a capacitor, respectively. Instead of switching both the charge and discharge currents on and off,...http://www.google.com/patents/US6046579?utm_source=gb-gplus-sharePatent US6046579 - Current processing circuit having reduced charge and discharge time constant errors caused by variations in operating temperature and voltage while conveying charge and discharge currents to and from a capacitor
