Title:
PROGRAMMABLE GAIN AMPLIFIER AND DELTA SIGMA ANALOG-TO-DIGITAL CONVERTER CONTAINING PGA
Document Type and Number:
WIPO Patent Application WO/2019/056275
Kind Code:
A1
Abstract:
A programmable gain amplifier (400A) includes an operational amplifier (402A) and a resistor network (405A) coupled to the output node (404A) of the operational amplifier. The resistor network includes a first plurality of resistors (410A) coupled in series between the output node and a first network node (406A). A second plurality of resistors (415A) is coupled in series between the first network node and a second network node (408A). A unit resistor (418A) is coupled in parallel with the second plurality of resistors between the first and second resistor network nodes and a third plurality of resistors (420A) is coupled in parallel between the second resistor network node and a reference voltage (VREF). Each resistor of the second and third pluralities of resistors comprises a unit resistor. The third plurality of resistors contains N resistors and the second plurality of resistors contains (N-1) resistors.
Inventors:
ZHANG JUN (CN)
Application Number:
PCT/CN2017/102780
Publication Date:
March 28, 2019
Filing Date:
September 21, 2017
Export Citation:
Assignee:
TEXAS INSTRUMENTS INC (US)
TEXAS INSTRUMENTS JAPAN LTD (JP)
ZHANG JUN (CN)
TEXAS INSTRUMENTS JAPAN LTD (JP)
ZHANG JUN (CN)
International Classes:
H03F3/45; H03G1/00
Foreign References:
| US20150084693A1 | 2015-03-26 | |||
| US20100001792A1 | 2010-01-07 | |||
| US9112465B2 | 2015-08-18 | |||
| EP2498400A1 | 2012-09-12 |
Attorney, Agent or Firm:
JEEKAI & PARTNERS (CN)
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