A Cryogenic Front-End Preamplifier Operating at 120 K for Bolometric Detector

Reza, A.; Vatsa, Veer N.; Pose, M. S.; Mazumdar, A.; Garai, A.; Krishnamoorthy, H.; Gupta, G.; Nanal, V.; Pillay, R. G.; Shrivastava, A.

doi:10.1007/s10909-019-02318-z

Cited by 2 publications

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“…pulse tube cooler [3,4]), the Johnson noise in the sensor [5] and other electronic components in the bolometer readout circuit. Minimization of the electrical noise in the readout circuit has attracted much attention and the efforts have been concentrated towards the design of low noise preamplifier [6] and preamplifiers operating at low temperature [7]. The effect of external noise pickups on the performance of the bolometer is already reported in ref.…”

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confidence: 99%

An analytical model for electronic noise in a cryogenic bolometer detector readout circuit

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This paper presents an analytical model to quantify the measured noise in a cryogenic bolometer readout circuit. The model includes the contributions from the bias resistors and sensor resistors, voltage and current noise of amplifier, and cable capacitance. The model parameters are empirically estimated using frequency domain analysis of the measured noise data of indigenously developed Neutron Transmutation Doped (NTD) Ge sensors. The model is shown to describe noise data for NTD Ge sensors over a wide range of resistances corresponding to temperatures in the range 20–70 mK. Relative contributions of different components are discussed and it is shown that the contribution to the overall noise from the differential amplifier at 300 K is the dominant source. It is observed that the amplifier flicker noise is significantly lower than that specified in the amplifier datasheet. The present study also indicates that a desirable value of resistance of NTD sensor (R NTD) from noise considerations is ≲ 1 GΩ at ∼ 20 mK.

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Section: Introductionmentioning

confidence: 99%

An analytical model for electronic noise in a cryogenic bolometer detector readout circuit

et al. 2022

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Very Low-Noise Figure HTSC RF Front-End

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A very low noise figure radio frequency (RF) front-end for the cellular realm is presented. The front-end is composed of two planar YBCO high critical temperature superconductor (HTSC) bandpass filters (BPFs) and a low temperature, low noise amplifier. Using advanced HTSC growth techniques, 8-pole hairpin BPFs are implemented in a YBCO thin film grown on both sides of a sapphire substrate. The front-end is designed and implemented based on the optimal configuration of the filters derived from advanced electromagnetic simulations. Measured performance at 77 K shows a high-frequency response and very low losses, with an insertion loss of 0.15 dB and a rejection ratio of −93 dBc. The integration of HTSC filters with the low noise amplifier results in a system with superior performance, with a low noise figure of around 0.5 dB. Low insertion loss and the compact dimensions of the filter, along with low total system noise, make the designed superconducting RF front-end highly attractive for radio receivers.

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A Cryogenic Front-End Preamplifier Operating at 120 K for Bolometric Detector

Cited by 2 publications

References 8 publications

An analytical model for electronic noise in a cryogenic bolometer detector readout circuit

An analytical model for electronic noise in a cryogenic bolometer detector readout circuit

Very Low-Noise Figure HTSC RF Front-End

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