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1. WO2019060461 - WIDE DYNAMIC RANGE CURRENT MEASUREMENT FRONT-END

Publication Number WO/2019/060461
Publication Date 28.03.2019
International Application No. PCT/US2018/051820
International Filing Date 19.09.2018
IPC
H03M 1/12 2006.01
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
MCODING, DECODING OR CODE CONVERSION, IN GENERAL
1Analogue/digital conversion; Digital/analogue conversion
12Analogue/digital converters
H03M 1/16 2006.01
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
MCODING, DECODING OR CODE CONVERSION, IN GENERAL
1Analogue/digital conversion; Digital/analogue conversion
12Analogue/digital converters
14Conversion in steps with each step involving the same or a different conversion means and delivering more than one bit
16with scale factor modification, i.e. by changing the amplification between the steps
H03M 3/00 2006.01
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
MCODING, DECODING OR CODE CONVERSION, IN GENERAL
3Conversion of analogue values to or from differential modulation
CPC
G01N 33/483
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
33Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
48Biological material, e.g. blood, urine
483Physical analysis of biological material
G01R 19/255
GPHYSICS
01MEASURING; TESTING
RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
19Arrangements for measuring currents or voltages or for indicating presence or sign thereof
25using digital measurement techniques
255using analogue/digital converters of the type with counting of pulses during a period of time proportional to voltage or current, delivered by a pulse generator with fixed frequency
H03M 1/12
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
MCODING; DECODING; CODE CONVERSION IN GENERAL
1Analogue/digital conversion; Digital/analogue conversion
12Analogue/digital converters
H03M 1/60
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
MCODING; DECODING; CODE CONVERSION IN GENERAL
1Analogue/digital conversion; Digital/analogue conversion
12Analogue/digital converters
60with intermediate conversion to frequency of pulses
H03M 1/668
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
MCODING; DECODING; CODE CONVERSION IN GENERAL
1Analogue/digital conversion; Digital/analogue conversion
66Digital/analogue converters
668Servo-type converters
H03M 3/458
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
MCODING; DECODING; CODE CONVERSION IN GENERAL
3Conversion of analogue values to or from differential modulation
30Delta-sigma modulation
458Analogue/digital converters using delta-sigma modulation as an intermediate step
Applicants
  • THE REGENTS OF UNIVERSITY OF CALIFORNIA [US]/[US]
Inventors
  • HSU, Chung-Lun
  • HALL, Drew, A.
Agents
  • SATHE, Vinay
  • SUMEDHA, Ahuja
  • AI, Bing
  • ARAIZA, Alberto, G.
  • AMETT, Stephen, E.
Priority Data
62/560,63419.09.2017US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) WIDE DYNAMIC RANGE CURRENT MEASUREMENT FRONT-END
(FR) FRONTAL DE MESURE DE COURANT DE GAMME DYNAMIQUE ÉTENDUE
Abstract
(EN)
In one aspect, an analog-to-digital converter circuit includes a transimpedance amplifier including a feedback capacitor electrically connected between an inverting or a non-inverting input of the transimpedance amplifier and an output of the transimpedance amplifier. The circuit includes an hourglass switch electrically connected on a first side to a first input and a second input, and electrically connected on a second side to the non-inverting input and the inverting input. A fine input current to the transimpedance amplifier is received at the first and second inputs. In a first mode, the hourglass switch electrically connects the first input to the non-inverting input and the second input to the inverting input, and in a second mode, the hourglass switch electrically connects the second input to the non-inverting input and the first input to the inverting input.
(FR)
La présente invention concerne, selon un aspect, un circuit convertisseur analogique-numérique qui comprend un amplificateur de transimpédance, qui comprend un condensateur à rétroaction électroconnecté entre une entrée inverseuse ou non inverseuse de l'amplificateur de transimpédance et une sortie de l'amplificateur de transimpédance. Le circuit comprend un commutateur en forme de sablier électroconnecté sur un premier côté à une première entrée et une seconde entrée, et électroconnecté sur un second côté à l'entrée non inverseuse et à l'entrée inverseuse. Un courant d'entrée fin vers l'amplificateur de transimpédance est reçu aux première et seconde entrées. Dans un premier mode, le commutateur en forme de sablier électroconnecte la première entrée à l'entrée non inverseuse et la seconde entrée à l'entrée inverseuse, et dans un second mode, le commutateur en forme de sablier électroconnecte la seconde entrée à l'entrée non inverseuse et la première entrée à l'entrée inverseuse.
Also published as
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