Title:
IN-CHIP REFERENCE CURRENT GENERATION CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2021/073126
Kind Code:
A1
Abstract:
An in-chip reference current generation circuit for supplying at least one reference current to at least one load. The in-chip reference current generation circuit comprises: a transistor (M1); an operational amplification unit (opamp), wherein a reference voltage (Vref1) is input into a positive input end of the operational amplification unit, a negative input end thereof is coupled to a source electrode of the transistor (M1), and an output end thereof is coupled to a gate electrode of the transistor (M1); a first pull-down resistor unit (10) coupled between the source electrode of the transistor (M1) and the ground, wherein the first pull-down resistor unit (10) is a resistor unit calibrated by a ZQ calibration circuit (100); and a current mirror unit (12) coupled between a drain electrode of the transistor (M1) and a power supply voltage and used for outputting a generated current for use by a load. The in-chip reference current generation circuit can provide a stable reference current.
Inventors:
JI RUMIN (CN)
YING ZHAN (CN)
YING ZHAN (CN)
Application Number:
PCT/CN2020/095337
Publication Date:
April 22, 2021
Filing Date:
June 10, 2020
Export Citation:
Assignee:
CHANGXIN MEMORY TECH INC (CN)
International Classes:
G05F3/26
Foreign References:
| CN101676828A | 2010-03-24 | |||
| CN107239092A | 2017-10-10 | |||
| CN101859158A | 2010-10-13 | |||
| CN102419609A | 2012-04-18 | |||
| US10429874B1 | 2019-10-01 |
Other References:
See also references of EP 3893079A4
Attorney, Agent or Firm:
SHANGHAI WINSUN INTELLECTUAL PROPERTY AGENCY (CN)
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