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Showing 1 to 11 of 11 for “"variable gain amplifier"”.
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Design of a High Temperature GaN-Based Variable Gain Amplifier for Downhole Communications
… the design of an intermediate frequency (IF) variable gain amplifier (VGA) for downhole communications, which can operate up to an ambient temperature of 230 °C. The proposed VGA is designed using 0.25 μm GaN on SiC high electron mobility transistor (HEMT) technology. Measured results at 230 …
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Design of a High Dynamic Range CMOS Variable Gain Amplifier for Wireless Sensor Networks
… testing results for a dB-linear, high dynamic gain range CMOS variable gain amplifier (VGA). The design adopts a new approximated exponential equation called the pseudo exponential equation to implement the dB-linear function. The proposed VGA is designed to have an extremely wide gain …
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Linear Analog Front -End Circuits for Fiber -Optic Communication Systems
Second, a variable gain amplifier is designed for electronic dispersion compensation based 10-Gb/s optical links. The design incorporates tunable emitter degeneration, hence satisfying linearity, bandwidth, and supply voltage requirements. Also, an analog multiplexer provides a wide gain tunability …
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Large Signal HBT Model and Integrated Circuit Design Using 300-Ghz Indium Phosphide HBT Technology
… achieved. In terms of circuit verification, high-gain and wideband variable gain amplifier (VGA) is developed using a negative-RE approach. This circuit shows a single-ended S21 of 18 dB and a 3-dB bandwidth of 50 GHz, producing a gain-bandwidth product of 397 GHz which is over two times of the …
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Nested chopper stabilization in analog multipliers and mixers
… is also tested with AC inputs as a squarer, variable gain amplifier, and direct-conversion mixer, demonstrating that chopper stabilization is effective for both DC and AC multiplication. The AC measurements show that chopping removes not only offset, but also 1/f noise and 2nd-order harmonic …
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LOW POWER AND HIGH SIGNAL TO NOISE RATIO BIO-MEDICAL AFE DESIGN TECHNIQUES
… are even AFE composed of an Instrumentation Amplifier (IA), which will have a better Common Mode rejection ratio (CMRR). The main function of the AFE is to convert the weak electrical Signal into large signals whose amplitude is large enough for an Analog Digital Converter (ADC) to detect …
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High-Performance CMOS Front-End ASICs for SiPM Detectors and High-Frequency Ultrasound and Photoacoustic Imaging
… energy measurement utilizing charge-sensitive amplifiers suffers from high power consumption and is not suitable for array-based SiPM readout systems. To solve these issues, two hardware prototypes in a 180 nm CMOS process have been fabricated and experimentally characterized. The first …
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A Completely Integrated Warm-IF Receiver and a 10GS/s Analog-Delay Pipeline ADC for Radio-Telescope Applications
… SKA telescopes. A receiver including a low-noise amplifier (LNA), a voltage-controlled oscillator (VCO), a mixer, and a variable-gain amplifier (VGA), based on CHAI design requirements, was implemented in 0.13 μm complementary metal-oxide semiconductor (CMOS) technology. An analog-to-digital …
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Power efficient Transmit/Receive (T/R) Elements for Integrated mm-Wave Phased Arrays
… respectively). Rx shows 23 to 25 dB peak gain, 6 to 9.3 dB NF and Tx can deliver upto 7 dBm output power with 18% power efficiency. Moreover, our PS can achieve 5-bit phase resolution with <2 degrees RMS phase error and provides 0 dBm saturated output power at 94 GHz. The phase shifter …
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Receivers for energy efficient optical interconnects
… a combination of a low bandwidth transimpedance amplifier (TIA) and a 4-tap decision feedback equalizer (DFE) to overcome the noise-bandwidth trade-off. Fabricated in a 65nm CMOS technology and heterogeneously integrated with a photonic IC, the proposed optical receiver achieves OMA sensitivity …
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Integrated realizations of reconfigurable low pass and band pass filters for wide band multi-mode receivers
… steps.There are several methods to implement variable frequency parameters. The most often used programming templates employ resistor and capacitor arrays, switched according to a given code. The low pass filter implementation proposed in this work uses a special switching template, optimized …