A noiseless multiple-input multiple-output (MIMO) channel operating under a strict complexity constraint at the receiver is introduced. According to this constraint, detected bits, obtained by performing hard decisions directly on the channel’s matched filter output, must be the same as the transmitted binary inputs. An asymptotic analysis is carried out using mathematical tools originated from...

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A telescopic cascode opamp typically has a higher frequency capability and consumes less power than other topologies. The disadvantage of a telescopic opamp is severely limited output swing. In a conventional telescopic opamp shown in Figure 1, all transistors are biased in the saturation region. Transistors M1-M2, M7-M8 and the tail current source M9 must have at least Vds,sat to offer a good ...

Magnetic flux leakage (MFL) testing is a widely used technology for detecting structural defects in industry, where new magnetic sensors can provide an enhanced detectability. We have fabricated and developed vortex tunnel junctions (MTJs) into MFL probe, by designing well-balanced gradiometer with base length of 4 cm. Such has exhibited field detectability 1.6nT/Hz at 1 kHz, superior common-mo...

In this work a novel bulk-driven (BD) ultra-low-voltage (ULV) class-AB operational transconductance amplifier (OTA) which exploits local common mode feedback (LCMFB) strategies to enhance performance and robustness against process, voltage temperature (PVT) variations has been proposed. The body-to-gate (B2G) interface increase the slew rate attain behaviour, whereas two pseudo-resistors have e...

A high performance bulk-driven rail-to-rail fully differential buffer operating from ±0.3V supplies in 180 nm CMOS technology is reported. It has a differential–difference input stage and common mode feedback circuits implemented with no-tail, CMRR pseudo-differential cells. operates subthreshold, infinite impedance, low output impedance (1.4 k?), 86.77 dB DC open-loop gain, 172.91 kHz bandwidt...

An optical hybrid design based on paired multimode interference couplers in silicon-on-insulator process is investigated. The device exhibits greater than 20 dB CMRR and low phase deviation (<10) over 30 nm in the C-band. The design eliminates the use of optical cross waveguides for integration with balanced photodetectors. Introduction Coherent detection scheme provides high spectral efficienc...

In measuring small voltage deviations of about 1 µV and lower, it is important to separate useful signals from noise. The measurement between the amplitudes two AC in wide frequency ranges, performed by using lock-in amplifiers with differential input as a comparator (null-indicator). resolution accuracy largely determined common-mode rejection ratio their channel. This work presents developed ...