Purpose of the development: To determine the frequency characteristics of 1 "and 1/2" capacitor microphones according to the electrostatic pressure in the frequency range 20 Hz - 20 kHz.

Recommended application field: In instrument making.

Technical characteristic: - rated input voltage - Up to 1 V RMS; - variable output voltage - Up to 100 V RMS (Cout = 20 nF); - the frequency range is from 20 to 20,000 Hz; - deviation AFC from the level at a frequency of 1000 Hz - Within ± 0.6 dB; - the bias voltage is 300, 500, 800 V DC (Rout = 10 M?); - the deviation of the bias voltage setting - ± 5 V; - the gain of the input signal is 100 ± 5%.

Advantages over analogues: Application of a powerful high-voltage (450 V) operational amplifier PA91 from Cirrus Logic.

The development stage readiness: Introduced in production

Description of the development:
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Automated measurements of the characteristics of condenser microphones using an electrostatic exciter and an amplifier UEV-1 are conducted jointly with the APK "ACOUSTIC". In accordance with the measuring program, the "ACOUSTIC" block produces a test sinusoidal signal. The amplifier UEV-1 forms a control voltage for an electrostatic driver, which is mounted on a verified microphone. Measuring the parameters of the microphone signal is carried out with the help of APK "ACOUSTIC". An amplifier with a power supply unit is subject to state verification. Calibration interval - 1 year.

corresponds technical description
Conforms to technical characteristic

Possibility of transfer abroad:
Realization of finished commodity
Joint production, sale, exploitation

Photo

Country Ukraine

For additional information turn to:
E-mail: gal@uintei.kiev.ua