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1. WO2022069122 - TRANSCONDUCTANCE TUNING IN PHOTON COUNTING

Publication Number WO/2022/069122
Publication Date 07.04.2022
International Application No. PCT/EP2021/073754
International Filing Date 27.08.2021
IPC
H03F 1/08 2006.1
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
1Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
08Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements
H03F 3/08 2006.1
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
3Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
04with semiconductor devices only
08controlled by light
H03F 3/45 2006.1
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
3Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
45Differential amplifiers
H03F 3/70 2006.1
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
3Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
70Charge amplifiers
H03F 3/72 2006.1
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
3Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
72Gated amplifiers, i.e. amplifiers which are rendered operative or inoperative by means of a control signal
H03G 5/12 2006.1
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
GCONTROL OF AMPLIFICATION
5Tone control or bandwidth control in amplifiers
02Manually-operated control
04in untuned amplifiers
10having semiconductor devices
12incorporating negative feedback
CPC
H03F 1/083
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
1Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
08Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements
083in transistor amplifiers
H03F 2200/144
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
2200Indexing scheme relating to amplifiers
144the feedback circuit of the amplifier stage comprising a passive resistor and passive capacitor
H03F 2200/213
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
2200Indexing scheme relating to amplifiers
213A variable capacitor being added in the input circuit, e.g. base, gate, of an amplifier stage
H03F 2200/231
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
2200Indexing scheme relating to amplifiers
231the input of an amplifier can be switched on or off by a switch to amplify or not an input signal
H03F 2200/312
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
2200Indexing scheme relating to amplifiers
312the loading circuit of an amplifying stage comprising one or more switches
H03F 2200/36
HELECTRICITY
03BASIC ELECTRONIC CIRCUITRY
FAMPLIFIERS
2200Indexing scheme relating to amplifiers
36the amplifier comprising means for increasing the bandwidth
Applicants
  • AMS INTERNATIONAL AG [CH]/[CH]
Inventors
  • MICHEL, Fridolin
Agents
  • EPPING HERMANN FISCHER PATENTANWALTSGESELLSCHAFT MBH
Priority Data
20198990.229.09.2020EP
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) TRANSCONDUCTANCE TUNING IN PHOTON COUNTING
(FR) ACCORD DE TRANSCONDUCTANCE DANS LE COMPTAGE DE PHOTONS
Abstract
(EN) A circuit arrangement (10) is provided which comprises an array of stages (11) for photon counting current to voltage conversion. Each stage (11) comprises a tunable operational transconductance amplifier (12) and a feedback network (16) forming a feedback loop of the operational transconductance amplifier (12). Each stage (11) is configured to provide an output signal as a function of an input signal that is provided to the amplifier input (13) of the operational transconductance amplifier (12), wherein the input signal comprises one or more current pulses and the output signal comprises one or more voltage pulses. With the tunable operational transconductance amplifier (12) the transconductance (gm) of a stage (11) can be tuned so that differences in peaking time and gain are avoided. Furthermore, an imaging device (24) and a method for operating a circuit arrangement (10) are provided.
(FR) L'invention concerne un agencement de circuit (10) qui comprend un ensemble d'étages (11) pour la conversion d'un courant de comptage de photons en tension. Chaque étage (11) comprend un amplificateur de transconductance opérationnel accordable (12) et un réseau de rétroaction (16) formant une boucle de rétroaction de l'amplificateur de transconductance opérationnel (12). Chaque étage (11) est configuré pour fournir un signal de sortie en fonction d'un signal d'entrée qui est fourni à l'entrée (13) de l'amplificateur de transconductance opérationnel (12), le signal d'entrée comprenant au moins une impulsion de courant et le signal de sortie comprenant au moins une impulsion de tension. L'amplificateur de transconductance opérationnel accordable (12) permet d'accorder la transconductance (gm) d'un étage (11) de façon à éviter des différences de moment de pic et de gain. En outre, l'invention concerne un dispositif d'imagerie (24) et un procédé de fonctionnement d'un agencement de circuit (10).
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