TECHNICAL SPECIFICATIONS
400 Series
. . . Email us at info@mech-tronics.com
Model 404 FET Preamplifier
MODEL 404 FET PREAMPLIFIER |
|
|
|
GENERAL DESCRIPTION
The Model 404 FET Preamplifier features a low noise FET transistor input circuit and is intended for room temperature silicon surface barrier detectors and low noise x-ray proportional counters. The Model 404 is inverting, highly linear and has fast rise time characteristics.
The preamplifier decay time constant is 50 µsec., matching the pole-zero cancelled 1st differentiator in Mech-Tronics' 500 Series main amplifiers. Operating power is derived through the single BNC signal interconnection between main amplifier and preamplifier.
COMPATIBILITY
The Model 404 FET is ideally suited for application with the range of Mech-Tronics amplifiers.
SPECIFICATIONS
| INPUT | |
| Polarity: | Either positive or negative accepted. |
| Impedance: | Effectively zero ohms. |
| OUTPUT | |
| Polarity: | Inversion of the input. |
| Impedance: | 50 ohms. |
| Test Input: | Accepts output from pulse generator through a 2.2 pf NPO Capacitor, useful in system calibration. |
| PERFORMANCE | |
| Noise: | 0.5 x 10-16 coulombs rms or 3.5 KEV FWHM (Si) with 10 pf input shunt capacitance and 0.8µsec. main amplifier clip and integration time constants. |
| Noise Slope: | 0.035 KEV/pf (Si) |
| Integral Linearity: | Within 0.1% to ±2 volts |
| Stability: | .005%/°C |
| Conversion Gain: | 450 millivolts per picocoulomb, 20 millivolts per MEV (Si) |
| Open Loop Gain: | >5,000 |
| Rise Time: | 35 nsec. |
| High Voltage: | Accepts 2800 volts maximum for detector |
| High Voltage Filter: | 1 megohm, 0.0005µf. |
| Blocking Capacitor: | 0.005µf. |
| Saturation Level: | ±4 volts open circuit measurement |
| CONNECTORS | |
| Detector: | Accepts input pulses from detector and furnishes high voltage out to the detector. Gremar No. 6317 |
| High Voltage Input: | Accepts high voltage to be furnished to detector. Gremar No. 6317 |
| Output: | Connects output pulses to main amplifier, and accepts preamplifier operating voltage from amplifier, BNC type UG1094/U. |
| Test Input: | Pulse generator input connector. BNC type UG1094/U. |
| Power Requirements: | -24 volts @ 10 ma derived from main amplifier |
| Cable Supplied: | 72 inch Signal Cable (BNC to BNC) Part No. 186300-72. |
| Ordering Information: | Ordering Stock No. | ||
| 000404-00 | Model 404 Preamp | ||
| 900404-01 | Model 404 Preamp with BNC input. | ||
| (All Shipping Weights 1.0 lb.) (Size = 1.125 x 2.875 x 4.375) |
LINKS . . .
| Mech-Tronics | Nuclear Division | |
| 1635 N. 25th Avenue | (708) 344-0202 | |
| Melrose Park, IL 60160 | ||
| (708) 344-9823 Fax (708) 344-0067 |
Email us at info@mech-tronics.com
Return to Mech-Tronics Services Page.
Return to Mech-Tronics Home Page.
Copyright © 1998 Mech-Tronics, All Rights Reserved
