Charge amplifier and method for converting charge signal into voltage signal
A technology of charge amplifier and charge amplification circuit, which is applied in the direction of charge amplifier, improved amplifier to reduce temperature/power supply voltage change, amplifier, etc., can solve the problem of clipping distortion of charge amplifier, avoid clipping distortion, and have good promotion and application value , a wide range of effects
Active Publication Date: 2018-04-17
CHINA AVIATION POWER MACHINE INST
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[0004] The invention provides a charge amplifier and a method for converting a charge signal into a voltage signal, which can effectively solve the clipping distortion problem of the charge amplifier caused by transient temperature
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[0028] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and fully convey the concept of example embodiments to those skilled in the art. The drawings are merely schematic illustrations of the invention and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus repeated descriptions thereof will be omitted.
[0029] Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided in order to give a thorough understanding of embodiments of the invention. However, those skilled in the art will appreciate...
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The application discloses a charge amplifier, and a method of converting charge signals into voltage signals; the charge amplifier comprises the following structures: a charge amplification circuit used for receiving an input charge signal and converting the charge signal into a voltage signal, and outputting the voltage signal; a feedback resistor; an electronic switch connected in series with the feedback resistor, and the formed series branch is connected in parallel between the input end and output end Out of the charge amplification circuit; an output voltage detection circuit coupled to the output end Out of the charge amplification circuit and used for detecting average voltage of the voltage signals outputted by the charge amplification circuit, and outputting a control signal according to the average voltage; a switch control circuit coupled to the output voltage detection circuit and used for receiving the control signal, and thus controlling switch-on / switch-off of the electronic switch according to the control signal. The charge amplifier can effectively solve the clipping distortion problems caused by transient temperature.
Description
technical field [0001] The invention relates to circuit technology, in particular to a charge amplifier and a method for converting charge signals into voltage signals. Background technique [0002] In aircraft engines or other internal combustion powered machinery, vibrations need to be measured. At present, in high-temperature environments, the sensors used to measure vibration mostly use piezoelectric effect sensors with superior characteristics. The output of this type of sensor is usually a charge signal, so the general preferred solution also needs to be equipped with a charge amplifier to convert the charge signal into a voltage signal. Taking the piezoelectric vibration sensor as an example, after the equipped charge amplifier converts the charge signal into a voltage signal, the output voltage signal can be easily amplified, filtered, calculus, etc., and the voltage signal can be further sent to Digital high-speed acquisition system. Its advantages are wide frequ...
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IPC IPC(8): H03F3/70H03F1/30
CPCH03F1/304H03F3/70
Inventor 刘金南卢洪林张利民赵黎陈大力李胜斌
Owner CHINA AVIATION POWER MACHINE INST