Charge Sensitive Preamplifiers & Shapers
High-performance modules for precise signal conditioning from various detector types.
Overview of Cremat Electronics
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.
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
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. (Data Sheet )
| 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. (Data Sheet )
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. 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 |
