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Amptek 电荷灵敏前段放大器
　Amptek Hybrid Selection Table (Specifications Subject to Change Without Notice)
Model Description Characteristics Applications
A101 Charge Sensitive Preamplifier & Discriminator Sensitivity: 1x106 electrons; Variable threshold; TTL and open collector output; 4MHz periodic; Externally adjustable discrimination levels and pulse width Pulse counting mode with: Photomultiplier tubes (PMT), Channel Electron Multipliers (CEM)
A111
A111F Charge Sensitive Preamplifier & Discriminator Sensitivity: 5x104 electrons; Variable threshold; TTL output; 2.5MHz periodic; Analog monitor output; Externally adjustable discrimination level Pulse counting mode with: Low gain photomultiplier tubes, Proportional counters, and Microchannel plates (MCP)
A121 12MHz Preamplifier Discriminator Sensitivity: 5x104 electrons; Voltage controlled threshold; 12MHz periodic; Analog monitor output; Adjustable pulse width Fast pulse counting mode with: Microchannel plates, Channel Electron Multipliers, Low gain PMTs, Proportional counters, and Solid state detectors
A203 Charge Sensitive Preamplifier & Shaper Preamplifier: Noise 900 electrons RMS; Rise time 50ns
Shaper: 300ns Peaking time; Sensitivity 5V/picocoulomb; Unipolar and bipolar outputs available Analog Mode with: Solid state detectors, Proportional counters, Photomultiplier tubes, and Channel Electron Multipliers
A206 Pulse Amplifier & Discriminator Amplifier: 10x gain
Discriminator: Sensitivity 50mV; 200kHz periodic; Externally adjustable low level discrimination levels and pulse width To follow a pulse shaper (A203, A225) for 10x gain and provide low level discrimination
A225
A225F Charge Sensitive Preamplifier & Shaper Preamplifier: Noise <280 electrons RMS; Rise time 20ns
Shaper: 2.5µs peaking time; Sensitivity 5V/picocoulomb Analog mode with: Solid state detector and Proportional counters
Will accept high capacitance detectors
A250
A250F
A250F/NF Charge Sensitive Preamplifier
"State-Of-The-Art" External FET to match detector characteristics, allows cooling of input FET; Rise time <2.5ns; Noise <100 electrons RMS at +20 °C, <20 electrons RMS with cooled FET All possible detectors can be connected to the A250 since the input FET is external and sensitivity is variable.
The A250 has been called "the best preamplifier in the world", because it can be adjusted by the user to perfectly match the detector characteristics, reduce noise, and maximize performance in every application.
A275
A275FC
A275FN Pulse Amplifier Low noise (4nV/ÖHz); Ultra low power (15mW), High slew rate (100V/µs), Wide band (ft=200MHz); Differential input, configurable as a shaping amplifier with adjustable gain and time constants Used for gain and shaping with the A250 or other charge preamps
A150 Pulse Amplitude Discriminator Tunnel diode snap action discriminator; Complementary CMOS outputs; 5MHz periodic; Externally adjustable discrimination level and pulse width To follow a pulse shaper (A203, A225, A275) for accurate level discrimination
BLR1 Baseline Restorer Restores baseline in high counting rate applications For use with the A275, A203, A225
PH300 Peak-Hold Detector To hold the peak of the analog pulse and interface with Analog to Digital converters. Both Wilkinson type and successive approximation ADC can be accommodated; Low power (<30mW); Low droop rate (<1µV/祍); Fast analog rise time (200ns) To be used with the A275, A225, A203 or any other pulse amplifier
　
　

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PLL 电荷灵敏前段放大器
Amptek 电荷灵敏前段放大器 　

　

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