Title:
CURRENT SOURCE CIRCUIT AND IMPLEMENTATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2020/019805
Kind Code:
A1
Abstract:
A current source circuit and an implementation method therefor, which can generate a current with an arbitrary temperature coefficient, and can also generate a current having two temperature coefficients in a full temperature range, meeting the temperature property requirement of a post-stage circuit for a bias current. The current source circuit comprises: a first current generating circuit (10) for generating a positive temperature coefficient current or a zero temperature coefficient current; and a second current generating circuit (11) for generating a zero temperature coefficient current or a positive temperature coefficient current. The result of the subtraction between the two temperature coefficient currents is obtained, subjected to proportional adjustment, and then added to the zero temperature coefficient current, so as to generate the final desired output current.
Inventors:
GENG WEISHENG (CN)
GUO XIAOFENG (CN)
LI LINXI (CN)
GUO XIAOFENG (CN)
LI LINXI (CN)
Application Number:
PCT/CN2019/084981
Publication Date:
January 30, 2020
Filing Date:
April 29, 2019
Export Citation:
Assignee:
MORNSUN GUANGZHOU SCI & TECH (CN)
International Classes:
G05F1/46
Foreign References:
| CN108762358A | 2018-11-06 | |||
| CN208569441U | 2019-03-01 | |||
| CN104238617A | 2014-12-24 | |||
| CN104238611A | 2014-12-24 | |||
| CN1340750A | 2002-03-20 | |||
| US20120218026A1 | 2012-08-30 | |||
| US20100201406A1 | 2010-08-12 |
Attorney, Agent or Firm:
GUANGZHOU ZHIYOU PATENT & TRADEMARK AGENCY CO., LTD. (CN)
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