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http://nopr.niscpr.res.in/handle/123456789/36198| Title: | Low noise pre-amplifier for far-infrared observations |
| Authors: | Subhaprada, G Khatri, K |
| Issue Date: | Jun-1991 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | Gallium doped germanium bolometer cooled to ~ 1.8 K is used as a detector for far-infrared (FIR) astronomical observations by using the TIFR balloon-borne telescope. Since the detector signals are weak (~ 40 nV), an AC coupled, feed-back stabilized, low noise pre-amplifier was designed to amplify these signals. The main features of the pre-amplifier designed are: (1) Frequency range, 5 Hz to 100 Hz; (2) Noise level (referred to input), ~10 nV/Hz1l2 at 10 Hz; (3) Gain stability, ~ 0.04% per °C (+ 25°C to – 20°C); and (4) Input impedence, > 100 MΩ. |
| Page(s): | 287-289 |
| ISSN: | 0975-105X (Online); 0367-8393 (Print) |
| Appears in Collections: | IJRSP Vol.20(3&4) [June & August 1991] |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| IJRSP 20(3&4) 287-289.pdf | 192.71 kB | Adobe PDF | View/Open |
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