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Amplifier circuit and method for conditioning an output current signal of a detecting element

A technology of amplifier circuit and output current, which is applied to improve the amplifier to reduce temperature/power supply voltage changes, amplifiers, electrical components, etc., and can solve the problem of weakening the compensation effect

Active Publication Date: 2014-06-11
NORSROP GRUMAN LITEF GMBKH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Due to the propagation delay of OPV 21, a phase shift occurs between the output signal of OPV 21 and the input signal, so that the compensation effect for higher frequencies is weakened

Method used

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  • Amplifier circuit and method for conditioning an output current signal of a detecting element
  • Amplifier circuit and method for conditioning an output current signal of a detecting element
  • Amplifier circuit and method for conditioning an output current signal of a detecting element

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Embodiment Construction

[0022] Figure 4 A circuit diagram showing an amplifier circuit having a detector element 11 according to an embodiment, the output current signal of the detector element 11 is to be converted into a voltage signal. According to one embodiment, the detector element 11 is a photodiode, for example a PIN photodiode with low signal-dependent output current, such as a PIN photodiode used in an interferometer or a PIN photodiode used in an optical fiber gyroscope to record interferometer signals PIN photodiodes, etc. According to other embodiments, the detector element is an alternating current signal source, a magnetic detector, a piezoelectric sensor or a thermoelement.

[0023] On the one hand, the detector element 11 may be connected to a voltage source via a bias resistor 6. On the other hand, the detector element 11 is electrically connected to the non-inverting input terminal of the operational amplifier (OPV) 23 and the load resistor 32, wherein the load resistor 32 is divide...

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PUM

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Abstract

The circuit has an operation amplifier (23) whose input is electrically connected with a connector and an operating resistor (32) of a detector element (11). The operating resistor is provided in form of sub-resistors (321, 322) that are connected in series. Compensation capacitors are connected parallel to the sub-resistors, and sub-capacitors (821, 822, 831, 832) are connected in series to each other. An output (O) of the operation amplifier is connected with the compensation capacitors and the sub-capacitors via a supply capacitor (7). An independent claim is also included for a method for conditioning output current signals of the detector element.

Description

Technical field [0001] Embodiments of the present invention relate to an amplifier circuit, a detector circuit with a photodiode, and a method for adjusting an output current signal of a detector element, wherein the detector element outputs an output current that depends on the physical quantity being detected. Background technique [0002] When physical quantities such as light, temperature, and pressure that can be detected by the detector element are applied to multiple detector elements or sensors such as photodiodes, the detector element or sensor generates an output current signal, and the intensity of the output current depends on the detected The amount or intensity or amplitude of a physical quantity, such as light intensity, temperature, and pressure. The output current signal is converted into a voltage signal through a load resistance or a transimpedance amplifier. [0003] figure 1 A transconductance amplifier circuit is shown, in which the detector element is abbrev...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03F1/32H03F1/30
CPCH03F2203/45528H03F3/087H03F3/45475H03F2200/36H03F2200/261H03F1/486H03F2203/45512H03F2203/45526H03F2203/45564
Inventor E·劳
Owner NORSROP GRUMAN LITEF GMBKH