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In this paper a 60 GHz monolithic low-power sixport receiver front-end for high precision industrial radar systems is presented. The measurement principle is based on the passive superposition and power detection of two incident millimeter-wave signals. The integrated receiver has been designed using a 0.13 μm SiGe BiCMOS process from IHP (SG13G2) and includes a low noise amplifier (LNA), the passive...
A D-Band total power radiometer, implemented in an advanced 90 nm SiGe BiCMOS technology is presented. The passive imager front-end consists of D-Band LNA followed by a HBT-based power detector. The LNA achieves 30 dB gain over 28 GHz bandwidth with measured noise figure lower than 7.5 dB. The square-law power detector achieves responsivity of 14.5 kV/W and noise equivalent power (NEP) <1.5 pW/√Hz...
We present performance characterization of a bio-potential recording system with an asynchronous readout architecture. The signal processing chain consists of a low-noise bio-potential amplifier, spike detection circuitry, and an address event representation (AER) communication protocol. The system was fabricated in a 0.5 pm CMOS technology. Each stage of the recording system was tested individually,...
We researched the performance of the aspheric lens as the receiving antenna of the indoor Visible Light Communication and got the different results with the lens placed in different situations. We use channel gain curves to describe the relationship between the Field-of-View and the optical gain of the receiving antenna. The experiment shows that the aspheric lens can provide a 15dB optical gain and...
In this paper, an interferer-tolerant receiver for the first group of ultra-wideband systems (3.1–4.8 GHz) is presented. The entire system operates in two modes; detecting and receiving. In the detecting mode, the locations of up to three blockers in 2.35–2.75 GHz and 5.1–5.9 GHz bands are reported to three notch filters used in the receiving path for rejection. In the receiving mode, the receiver...
A 40 Gb/s PAM4 receiver with novel digital clock and data recovery (CDR) and one tap decision feedback equalizer (DFE) has been presented. Without sophisticated transition detection and selection modules, the proposed CDR utilizes three bang-bang phase detectors sampling all the transitions to detect the phase error between the data and clock, achieving larger transition density and CDR bandwidth...
In this work, a fast method for vector modulation based active leakage cancellation is proposed for UHF RFID readers. The search space is narrowed by an initial phase and amplitude comparison between the reference signal and the leakage signal. The proposed method achieves up to 32% reduction in the number of search steps with up to 60 dB suppression in the leaked signal power. Moreover, the settling...
The problem of detecting an unknown signal embedded in white Gaussian noise is addressed. The detector based on Wilcoxon signed-rank test is proposed as the solution for this problem. The detector analyses the spectrum of a received signal. Detection capability of this detector has been evaluated via mathematical modeling. Comparison with other prevalent detectors has been done.
The military wireless systems often have specific constraints such as achieving very good receiver sensitivity, very high tolerance to frequency shifts and best possible dynamic range. Direct spread spectrum (DSS) is the proven threat free technology in many militarized wireless systems, which will also gives the advantage of good receiver sensitivity because of spreading gain it offers. The RF dynamic...
In this work the complete system for THz measurements is presented and briefly described. Proposed solution allows to avoid the most important disadvantages of the lock-in technique without compromising the noise parameters of the developed readout system. The prototype, designed and tested by the authors, supports the pixel line of FET-based THz detectors. The system consists of the hardware part...
A noise-efficient readout interface designed in a 150nm standard CMOS technology for a FET based THz radiation detector is presented. The interface is able to detect μV-range rectified signal from the FET detector, amplifying it by 70 dB gain. A multistage switched-capacitor (SC) readout channel employing chopper modulation is exploited so as to remove 1/ƒ noise and obtain repeatable gain and frequency...
This paper presents an AM detector circuit in a bendable a-IGZO TFT technology. The circuit is based on a common-source stage loaded with a single-ended active inductor, which uses only one active transistor. This active inductor is the key element for the achieved circuit performance. The detector circuit consumes only 0.39 mW, which is almost a tenfold improvement over previous works in the same...
This paper presents an AM detector circuit in a bendable a-IGZO TFT technology. The circuit is based on a common-source stage loaded with a single-ended active inductor, which uses only one active transistor. This active inductor is the key element for the achieved circuit performance. The detector circuit consumes only 0.39 mW, which is almost a tenfold improvement over previous works in the same...
Multi-channel, fully integrated CMOS optical receivers combining with spatially modulated photo detector (SMPD) array, transimpedance amplifiers, and limiting amplifiers are presented. It demonstrates scalable channel numbers with minimum area overhead and low cross talk of less than 0.1 dB. The receiver array is implemented in 0.18 μm CMOS and provides 20 Gbps throughput (5Gbps × 4). The conversion...
We propose a method for making THz detector antenna gain frequency dependency smooth by using conductive substrate. However, an increase of substrate conductivity decreases antenna gain even if an insulation layer is present.
A design of low-noise wide band (0.05…1 GHz) cooled videoamplifier for prospective terahertz-range single-photon superconducting nanowire detectors is reported. The amplifier differs from existing prototypes by reduced consumption power (4mW) and ability of direct integration with the primary superconducting transducer to prevent false triggering caused by reflected waves in the detector-amplifier...
Linear Frequency Modulation - Pulse Compression (LFM-PC) search radars have a high processing gain that improves their detection performance even at low values of Signal-to Noise Ratio (SNR). To deny the radar detection, the jammer should use high jamming power to overcome this high processing gain which increases the required Jamming-to-Signal Ratio (JSR) is, in most cases, extravagant and unachievable...
Antenna coupled Infrared (IR) detectors are increasingly researched for their promising fast response, uncooled operation and CMOS compatibility. However, their three order of magnitude lower detectivity compared to other commercial IR detectors is the main obstacle to be commercialized. One of the directions that is expected to increase the detectivity is through decreasing the expected sever losses...
This paper presents an all-digital standard cell SR-Latch based time amplifier (TA) with a variable gain of 6X and 12X. In this TA, a two-stage gain selection unit is applied to enable the TA to select either the high gain for short input pulse intervals or the low gain for long input pulse intervals. The time amplification gain is 6 in the input range of −700ps ∼700ps, and reaches 12 if the input...
In integrated circuits, time resolution is preferred over voltage resolution as it offers larger operating range. Time difference amplifiers are also useful in measurement of small phase differences. A simple but high gain Time Difference Amplifier (TDA) is presented in this paper. The TDA amplifies the width of a pulse for precise measurement of time difference. The pulse width amplification is achieved...
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