METHOD, OSCILLATION CIRCUIT AND INTEGRATED CIRCUIT FOR GENERATING OSCILIATING ELECTRIC SIGNAL

Title:

METHOD, OSCILLATION CIRCUIT AND INTEGRATED CIRCUIT FOR GENERATING OSCILIATING ELECTRIC SIGNAL

Document Type and Number:

Japanese Patent JPH0969760

Kind Code:

A

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.

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Inventors:

FURANCHIESUKO PURUBUIRENTEI
RITSUKARUDO URUSHIINO
ROBERUTO GARIBORUDEI

Application Number:

JP7435096A

Publication Date:

March 11, 1997

Filing Date:

March 28, 1996

Export Citation:

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Assignee:

CONS RIC MICROELETTRONICA
SGS THOMSON MICROELECTRONICS

International Classes:

H03F3/45; H03K3/011; H03K3/0231; H03K3/354; H03K4/06; H03K19/0948; (IPC1-7): H03K3/354; H03F3/45; H03K4/06; H03K19/0948

Attorney, Agent or Firm:

Soga Doteru (6 people outside)

Next Patent: INPUT SIGNAL DISCRIMINATION CIRCUIT