Results 161 to 170 of about 2,110 (220)
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A preamplifier for magnetostriction spark chambers
Nuclear Instruments and Methods, 1970Abstract The specifications of a non overloading preamplifier for magnetostriction spark chambers are described in detail. The design of the preamplifier that has been developed is discussed. Its characteristics are: gain of 1300, risetime of 80 nsec, equivalent input noise of 10 μV r.m.s.
DE BLASI, Mario +2 more
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Performance of an optical detector preamplifier
Optics Letters, 1993The possibility for improvement of the signal-to-noise ratio of a Doppler lidar has been deduced theoretically and shown experimentally. An optical amplifier has been built up and integrated into a Doppler lidar. The measured improvement of the signal-to-noise ratio has been compared with the calculated value.
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A Preamplifier for a CdHgTe Photodetector
Instruments and Experimental Techniques, 2020A preamplifier for operation with an HgCdTe-based nitrogen-cooled IR photodetector (600 nm–15 μm) is described. The preamplifier operates in the photoconductivity mode. The use of modern microcircuits made it possible to increase the bandwidth of the response to 2 MHz at a noise level of 0.5 nV/Hz1/2, which is close to the fundamental limit that is ...
D. V. Kazantsev, E. A. Kazantseva
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A hybrid electrometer preamplifier
Journal of Scientific Instruments, 1964A circuit is given for a simple valve-transistor direct-coupled preamplifier of very high input impedance, useful for the measurement of mass spectrometer ion currents. The noise and drift after warm-up are below 10-14 A through the 1011 ohm input resistor.
R D Russell, R G Ostic, J S Stacey
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IETE Journal of Research, 1972
In this paper a general method is brought out for the design of a preamplifier to be used in VHF range. Adoption of this method simplifies in obtaining good signal to noise ratio without heavy loss or gain. The preamplifier discussed in this paper is designed for the back scatter radar operating at 54·95 MHz.
C. D. Prasad, C. L. Jain
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In this paper a general method is brought out for the design of a preamplifier to be used in VHF range. Adoption of this method simplifies in obtaining good signal to noise ratio without heavy loss or gain. The preamplifier discussed in this paper is designed for the back scatter radar operating at 54·95 MHz.
C. D. Prasad, C. L. Jain
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A CARDIO PREAMPLIFIER FOR THE FREE‐ROVING RAT
Psychophysiology, 1965ABSTRACTA transistorized amplifier has been designed with the aim of providing a reliable triggering signal for a cardiotachograph when it is recording from small animals. The frequent base‐line instabilities of the cardio signal caused by the animal's movements are eliminated by the use of a transformer at the input. Direct coupling between the stages
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A miniature pulser-preamplifier for ultrasonic transducers
Ultrasonics, 1972Abstract In order to avoid difficulties experienced with conventional ultrasonic systems using several feet of shielded cable to connect transducer and electronics, a miniature pulser-preamplifier was developed to fit the transducer holder. Its characteristics proved superior to most devices in common use.
G H, Myers +4 more
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A stereophonic transistor preamplifier
IRE Transactions on Audio, 1961Designed to drive two transistor-power amplifiers previously described, this preamplifier contains all the controls necessary for stereophonic and monophonic programs. The first two of the three stages form a complementary circuit readily adaptable for the various input sources, which provides the necessary gain and equalization for low-level ...
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Hydrophone-Preamplifier Optimization
The Journal of the Acoustical Society of America, 1966In any system, a number of hydrophone-preamplifier combinations are capable of meeting the design parameters; however, the choice of an optimum design is not always obvious. This paper presents an approach by which an optimum design may be obtained. Since the output signal-to-noise ratio of the preamplifier is a function of hydrophone sensitivity and ...
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