Title :
Current-ratio temperature compensation in bipolar relaxation oscillator
Author :
Splithof, M.H. ; van Tuijl, A.J.M. ; Gierkink, S.L.J. ; Klumperink, E.A.M.
Author_Institution :
Philips Semiconductors, Nijmegen, Netherlands
Abstract :
A new temperature compensation strategy for bipolar relaxation oscillators is presented. The compensation scheme is suitable for both Schmitt-trigger oscillators and emitter-coupled multivibrators and requires a minimum amount of circuitry for the compensation. The feasibility of this compensation scheme is demonstrated by the results of a test chip. Without any trimming and with a total current consumption of 2.5mA, a temperature coefficient of approximately -90ppm/°C has been achieved at frequencies up to 2.5MHz.
Keywords :
Capacitors; Circuit topology; Feedback circuits; Frequency; Hysteresis; Switches; Temperature dependence; Timing; Voltage control; Voltage-controlled oscillators;
Conference_Titel :
Solid-State Circuits Conference, 1998. ESSCIRC '98. Proceedings of the 24th European
Conference_Location :
The Hague, The Netherlands
DOI :
10.1109/ESSCIR.1998.186291
