Amplifiers
Low Noise, Wide Bandwidth
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Kolmar Technologies offers many choices of low noise amplifiers matched to a detector type to obtain a minimum noise figure and maximum D*. HgCdTe photoconductors require amplifiers with minimum noise figure at 50 ohms input. Very high impedance detectors, such as InSb photodiodes, require amplifiers with minimum current noise. |
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All Kolmar amplifiers include a detector biasing circuit to optimize the detector for its particular application. With slight reverse bias, LWIR infrared photodiodes have a square root of 2 improvement in detectivity. Reverse bias voltage eliminates shot noise of the majority carrier current and reduces junction capacitance. Therefore the bias increases bandwidth and improves D*. Bias is also a factor in linearity and dynamic range. We can make the tradeoffs to achieve the optimum detector amplifier match for your application. |
Amplifiers for KV104 series HgCdTe photodiodes
Gain |
Bandwidth |
Output |
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KA020-A1A |
TIA + bias |
1E4 V/A |
100 Hz 20MHz |
20V p-p |
KA020-A1 |
TIA + bias |
1E4 V/A |
DC 20 MHz |
20 V p-p |
KA050-A1 |
TIA + bias |
8E3 V/A |
DC 50 MHz |
20 V p-p |
KA100-A1 |
TIA + bias |
5E3 V/A |
DC 100 MHz |
8 V p-p |
Amplifiers for KMPC series HgCdTe photoconductors
Gain |
Bandwidth |
Output |
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KA-S3 |
TIA + bias |
1E4/Rd V/V |
20 Hz 300 kHz |
20 V rms |
KA-S4 |
TIA + bias |
1E4/Rd V/V |
20 Hz 500 kHz |
20 V rms |
KA-S5 |
TIA + bias |
1E4/Rd V/V |
20 Hz 1 MHz |
20 V rms |
Amplifiers for KISD series InSb photodiodes
Gain |
Bandwidth |
Output |
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KA020-C1 |
TIA + bias |
2E4 V/A |
DC 20 MHz |
20 V p-p |
KA05-C1 |
TIA + bias |
5E4 V/A |
DC 5 MHz |
20 V p-p |
KA03-C1 |
TIA + bias |
1E5 V/A |
DC 3 MHz |
20 V p-p |
KA01-E6-AG |
Adj. gain 1-2-5-10 step+bias |
1E5 1E7 V/A |
DC 1 MHz |
20 V p-p |
Post Amplifiers: Gain and Line Drivers
KA100-E1 |
Buffer |
1 V/V |
DC 100 MHz* |
20 V p-p |
KA100-E2 |
Buffer |
20 V/V |
DC 100 MHz* |
20 V p-p |
KA100-E3 |
Buffer |
2 V/V |
DC 100 Hz* |
20 V p-p |
*AC coupled 100 Hz 100 MHz (optional)