Title:
駆動電流調整機能付きバッファ回路
Document Type and Number:
Japanese Patent JP3547854
Kind Code:
B2
Abstract:
A buffer circuit with driving current adjusting function is provided which may automatically set a driving current characteristics of a buffer to the most suitable value according to a system where the driving current is to be applied. A buffer circuit with driving current adjusting function of the present invention comprises a buffer circuit which is controlled by a control signal for supplying a most appropriate driving current to a load; a load detecting circuit for detecting a phase difference between an input signal and an output signal of the buffer circuit and for outputting voltage corresponding to the phase difference, a control signal generating circuit for generating a signal which controls the driving current of the buffer circuit in response to an output signal of the load detecting circuit, the control signal controls so that the driving current of buffer circuit is increased when delay time of buffer circuit becomes long and the driving current of buffer circuit is decreased when delay time becomes short.
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Inventors:
Kayuki Ota
Ichiro Tomioka
Eiji Murakami
Ichiro Tomioka
Eiji Murakami
Application Number:
JP14189695A
Publication Date:
July 28, 2004
Filing Date:
June 08, 1995
Export Citation:
Assignee:
Renesas Technology Corp.
Renesas lsi design Co., Ltd.
Renesas lsi design Co., Ltd.
International Classes:
H03K19/0175; G11C11/409; H03F1/56; H03K19/003; (IPC1-7): H03F1/56; H03K19/0175
Domestic Patent References:
| JP7202671A | ||||
| JP5175805A | ||||
| JP7066702A |
Attorney, Agent or Firm:
Kazuto Izumi