公开(公告)号：JPH0969760A

公开(公告)日：1997-03-11

申请号：JP7435096

申请日：1996-03-28

Applicant: CONS RIC MICROELETTRONICA ,  SGS THOMSON MICROELECTRONICS

Inventor： FURANCHIESUKO PURUBUIRENTEI ,  RITSUKARUDO URUSHIINO ,  ROBERUTO GARIBORUDEI

IPC: H03F3/45 ,  H03K3/011 ,  H03K3/0231 ,  H03K3/354 ,  H03K4/06 ,  H03K19/0948

Abstract: PROBLEM TO BE SOLVED: To provide an oscillation circuit generating an oscillation electric signal which is not easily affected by supply voltage and a temperature. SOLUTION: A capacitor C, a charge circuit CCA and a control circuit CCO are provided. The charge circuit CCA contains a first current generation device GEN1 and a second current generation device GEN2, which have first and second current values and respectively opposite directions, and switch means SW1 and SW2 designed in such a way that the generation devices GEN1 and GEN2 are connected to the capacitor C. The control circuit CCO has voltage input connected to the capacitor C and output connected to the control inputs of the switch means SW1 and SW2 and contains a comparator containing a hysteresis having a lower-side threshold and an upper-side threshold.