Title:
出力回路およびオペアンプ
Document Type and Number:
Japanese Patent JP4375025
Kind Code:
B2
Abstract:
An output circuit comprises first and second transistors, a driving circuit and a current mirror circuit. The driving circuit supplies a relatively small constant current to the base of the first transistor. When a current flows to the collector of the first transistor, a current with a magnitude set at a fixed ratio with respect to the current flows to the collector of the second transistor, and a current proportional to the current flowing to the collector of the second transistor flows to the base of the first transistor by way of the current mirror circuit. That is, a current, which is determined in accordance with a current flowing to the collector of the first transistor, flows to the base of the first transistor.
Inventors:
Nobuyoshi Nagamura
Application Number:
JP2004005393A
Publication Date:
December 02, 2009
Filing Date:
January 13, 2004
Export Citation:
Assignee:
株式会社デンソー
International Classes:
H03F1/02; H03B1/00; H03F3/30; H03F3/45; H03K17/042; H03K17/66
Domestic Patent References:
| JP2000124745A | ||||
| JP2000244256A | ||||
| JP8056131A | ||||
| JP7222482A | ||||
| JP59086317A | ||||
| JP2001053555A | ||||
| JP2246777A | ||||
| JP2000068758A |
Attorney, Agent or Firm:
Tsuyoshi Sato
Kiyoshi Ogawa
Kiyoshi Ogawa