Title:
IMPEDANCE ADJUSTMENT CIRCUIT, CHIP AND REFERENCE VOLTAGE GENERATION CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2020/097932
Kind Code:
A1
Abstract:
Disclosed is an impedance adjustment circuit for determining a resistance value of a terminal resistor unit, wherein the terminal resistor unit comprises a plurality of resistors. The impedance adjustment circuit comprises: a current mirror for providing a first reference current and a second reference current, wherein the current mirror uses a first reference current mirror to emit the second reference current; a reference voltage generation circuit generating, according to at least the first reference current, a first clock and a second clock, a reference voltage; a switch group comprising multiple switches; a comparator generating a comparison result according to the reference voltage and a terminal resistor voltage; and a control unit controlling, according to the comparison result, the turn-on and turn-off of multiple switches in the switch group.
Inventors:
HUANG MU-LI (CN)
Application Number:
PCT/CN2018/115998
Publication Date:
May 22, 2020
Filing Date:
November 16, 2018
Export Citation:
Assignee:
SHENZHEN GOODIX TECH CO LTD (CN)
International Classes:
H03H11/28
Foreign References:
| CN1874148A | 2006-12-06 | |||
| CN102778910A | 2012-11-14 | |||
| CN1874148A | 2006-12-06 | |||
| CN102778910A | 2012-11-14 | |||
| CN1900923A | 2007-01-24 | |||
| CN105680818A | 2016-06-15 | |||
| US20090261866A1 | 2009-10-22 |
Attorney, Agent or Firm:
TIANTAI LAW FIRM (CN)
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