Endevco airborne amplifiers serve flight testing
The hybrid microcircuit construction of both the 2680M-XXX and 2685V series allows them to be offered in compact packages with low power consumption.
-- Test & Measurement World, 1/6/2010 1:47:00 PM
Operating from an onboard aircraft DC power source, Endevco airborne amplifiers team with piezoelectric microphones and accelerometers for use in flight-test applications. The hybrid microcircuit construction of both the 2680M-XXX and 2685V series allows them to be offered in rugged, compact packages with low power consumption.
Charge amplifiers in the 2680M-XXX series furnish dual outputs, one biased and the other unbiased, both of which are adjustable with a common gain control. Units are also available with an optional low-pass filter. The Model 2685V is a voltage amplifier for use with Isotron (IEPE-type) accelerometers, providing a constant current power source to a transducer's integral electronics, while maintaining a two-wire connection.
Units have an output voltage proportional to input acceleration or sound. Amplifier sensitivity is not significantly affected by input cable capacitance, while the use of modular construction techniques permits greater versatility in gain and filter choices.
Accelerometers recommended for use with the 2680M-XXX and 2685V airborne amplifiers include the Model 7255A Pyrotron accelerometer; the Model 2271A/AM20 cryogenic accelerometer; the thru-bolt-mounted Model 2221F accelerometer; and the Model 2510 piezoelectric microphone.
Endevco, www.endevco.com.
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