RU94028635A - Semiconductor light detector - Google Patents

Semiconductor light detector

Info

Publication number
RU94028635A
RU94028635A RU94028635/25A RU94028635A RU94028635A RU 94028635 A RU94028635 A RU 94028635A RU 94028635/25 A RU94028635/25 A RU 94028635/25A RU 94028635 A RU94028635 A RU 94028635A RU 94028635 A RU94028635 A RU 94028635A
Authority
RU
Russia
Prior art keywords
drain
field
circuit
effect
drain terminals
Prior art date
Application number
RU94028635/25A
Other languages
Russian (ru)
Other versions
RU2086042C1 (en
Inventor
В.С. Осадчук
Ua]
Е.В. Осадчук
А.В. Осадчук
Original Assignee
В.С. Осадчук
Ua]
Е.В. Осадчук
А.В. Осадчук
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by В.С. Осадчук, Ua], Е.В. Осадчук, А.В. Осадчук filed Critical В.С. Осадчук
Priority to RU94028635A priority Critical patent/RU2086042C1/en
Publication of RU94028635A publication Critical patent/RU94028635A/en
Application granted granted Critical
Publication of RU2086042C1 publication Critical patent/RU2086042C1/en

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  • Light Receiving Elements (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Abstract

FIELD: instruments, in particular, automatic control devices for manufacturing. SUBSTANCE: device method involves conversion of capacitance to frequency. To achieve this field photo transistors are used as oscillation circuit capacitance elements which are controlled by light while passive inductance coil is used as inductance of oscillation circuit. This results in possibility to gain negative voltage at drain- drain terminals of field-effect photo transistors when control voltage is applied. This results in generation of electric oscillations in parallel circuit of capacitor-feature impedance on drain-drain terminals of field-effect photo transistors and inductance resistance of passive inductance coil. When light is received by field-effect photo transistors, capacitance constituent of impedance at drain- drain terminals is altered and resonant frequency of circuit is changed. EFFECT: increased sensitivity and increased precision. 1 dwg

Claims (1)

Предлагаемое изобретение относится к контрольно-измерительной технике и может быть использовано как датчик освещенности в различных устройствах автоматизированного управления технологическими процессами. Цель: создание полупроводникового датчика освещенности, который обладает высокой чувствительностью и точностью измерений. Это достигается тем, что в предлагаемом устройстве осуществляется преобразование емкости в частоту, для чего полевые фототранзисторы выступают в качестве управляемых светом емкостных элементов колебательного контура, а индуктивным элементом служит пассивная индуктивность. Такая конструкция устройства при подаче управляющих напряжений обеспечивает на зажимах сток-сток полевых фототранзисторов отрицательное сопротивление, которое приводит к возникновению электрических колебаний в контуре, образованном параллельным включением полного сопротивления с емкостным характером на зажимах сток-сток полевых фототранзисторов и индуктивным сопротивлением пассивной индуктивности. При подаче оптического излучения на полевые фототранзисторы происходит изменение емкостной составляющей полного сопротивления на зажимах сток-сток, что приводит к изменению резонансной частоты контура.The present invention relates to instrumentation and can be used as a light sensor in various devices for automated control of technological processes. Purpose: creation of a semiconductor light sensor, which has high sensitivity and measurement accuracy. This is achieved by the fact that in the proposed device, the capacitance is converted to frequency, for which field phototransistors act as light-controlled capacitive elements of the oscillatory circuit, and the passive inductance serves as an inductive element. Such a design of the device when supplying control voltages provides negative resistance at the drain-drain terminals of field-effect phototransistors, which leads to the occurrence of electrical oscillations in the circuit, formed by the parallel inclusion of impedance with a capacitive nature at the drain-drain terminals of field-effect phototransistors and inductive resistance of passive inductance. When optical radiation is applied to field-effect phototransistors, the capacitive component of the impedance changes at the drain-drain terminals, which leads to a change in the resonant frequency of the circuit.
RU94028635A 1994-07-29 1994-07-29 Semiconductor brightness detector RU2086042C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RU94028635A RU2086042C1 (en) 1994-07-29 1994-07-29 Semiconductor brightness detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RU94028635A RU2086042C1 (en) 1994-07-29 1994-07-29 Semiconductor brightness detector

Publications (2)

Publication Number Publication Date
RU94028635A true RU94028635A (en) 1997-04-27
RU2086042C1 RU2086042C1 (en) 1997-07-27

Family

ID=20159174

Family Applications (1)

Application Number Title Priority Date Filing Date
RU94028635A RU2086042C1 (en) 1994-07-29 1994-07-29 Semiconductor brightness detector

Country Status (1)

Country Link
RU (1) RU2086042C1 (en)

Also Published As

Publication number Publication date
RU2086042C1 (en) 1997-07-27

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