Accession Number:

AD0602582

Title:

ELECTOMETRIC AMPLIFIER,

Descriptive Note:

Corporate Author:

FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Report Date:

1964-05-05

Pagination or Media Count:

15.0

Abstract:

There is described an electometric amplifier for the measurement of direct current in range 10 to the minus 11th power to 10 to the minus 15th power amperes. The amplifier uses an I-1 straight-filament electometric pen tode of rod construction, working in circuit with the control of the first grid. The amplifier is noted for a large voltage amplification factor of the electrometric cascade, simplicity of circuit, construction, economy, small demensions and weight. In the circuit of the amplifier are used semiconductor devices. One of the basic parameters of the electrometric amplifier is the magnitude of the current of the control grid of the first cascade. For the purpose of lowering this current the electometric cascade usually works at low anode voltage, and a measured signal passes onto the second or third grid of the tube. Under such conditions, because of the low transconductance of the tube, the voltage amplification factor of the cascade does not exceed 1 to 2. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE