Charge Sensitive Preamplifiers & Shapers

Advatech supplies Charge Sensitive Preamplifier and Shaping Amplifier modules, board assemblies and instruments designed and manufactured by Cremat Inc.
Cremat’s pulse detection electronics can be used with a wide range of detector types, including PIN photodiodes, avalanche photodiodes, PMTs, SiPMs, surface barrier/PIPS detectors, CT/CZT semiconductor radiation detectors or gas based detectors (MWPC, proportional tubes, 3He, BF3 etc.).
The following summarises the various modules, boards and instruments assemblies available

(Click on Part No. for Data Sheets)

Charge Sensitive Preamplifiers

The core Cremat products are charge sensitive preamplifier modules, which are small 8-pin single in-line (SIP) packages, epoxy-coated single channel circuits. Four variants are available.

How to choose a CSP?

Part No.	Gain	Rise Time	Decay Time Constant
CR-110	1,400mV/pC	7ns	140µs
CR-111	130mV/pC	3ns	150µs
CR-112	13mV/pC	3ns	50µs
CR-113	1.3mV/pC	1ns	50µs

Shaping Amplifiers (Data Sheet)

These modules include a shaping stage following the CSP stage to reshape the CSP output pulse from a ‘tail pulse’ into a Gaussian pulse and to filter much of the noise from the amplified signal. Shaping amplifiers can also be used to provide extra gain to the signal.

Part No.	Shaping Time
CR-200-50s	50ns
CR-200-100ns	100ns
CR-200-250ns	250ns
CR-200-500ns	500ns
CR-200-1µs	1µs
CR-200-2µs	2µs
CR-200-4µs	4µs
CR-200-8µs	8µs

Baseline Restorer (CR-210)

The CR-210 module is a baseline restorer (BLR) circuit which corrects for the natural baseline depression at the shaping amplifier output which occurs during high count rates. The use of the CR-210 will allow for higher resolution spectroscopic measurements. The module should be used at the output stage of one of the CR-200 Series modules.

Evaluation Boards / Housings

Part No.	Functions
CR-150	Takes one of the CR-11X Series modules. I/O Connectors, Voltage Regulation, Detector Bias Voltage, Coupling Circuit
CR-160	Takes one of the CR-200 Series modules.I/O Connectors, Adjust. Gain, Reversible Polarity, O/P Offset Adjust. Pole/Zero Compensation
CR-150-BOX	Housing for CR-150 Evaluation Board. Painted and labelled diecast housing.
CR-160-BOX	Housing for CR-160 Evaluation Board. Painted and labelled diecast housing.

Instruments

Part No.	Based on	Functions
CR-Z-11X	CR-11X	PSU, Inputs to Bias Detector, Input for Detector, Preamplifier Output,connector options to cover bias voltages up to 500V or 2,000V.
CR-S-X	CR-200

PSU, Inputs to Bias Detector, Input for Detector, Preamplifier Output,connector options to cover bias voltages up to 500V or 2,000V.