منابع مشابه
A 125 MHz Digital Equalizer for Broadband Communications
A 125 MHz digital equalizer has been designed based on a 0.25 μm CMOS standard cell library. Partially conforming to the Gigabit Ethernet 1000Base-T standard, the equalizer includes a 16-tap feed-forward adaptive FIR filters accepting 8-bit input, and a 16-tap decision-feedback adaptive FIR filters producing 5-level output symbols. The modified Booth encoding and Wallace tree compression scheme...
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The ultrasound attenuation coefficient and dispersion from 0-70 MHz in whole human blood and its components (red blood cells and plasma) at 37°C is reported. The measurements are made using a fixed path substitution technique that exploits optical mechanisms for the generation and detection of ultrasound. This allows the measurements to cover a broad frequency range with a single source and rec...
متن کاملIn vivo photoacoustic microscopy with 7.6-µm axial resolution using a commercial 125-MHz ultrasonic transducer.
Photoacoustic microscopy has achieved submicron lateral resolution, but its axial resolution is much lower. Here an axial resolution of 7.6 μm, the highest axial resolution validated by experimental data, has been achieved by using a commercial 125 MHz ultrasonic transducer for signal detection followed by the Wiener deconvolution for signal processing. Limited by the working distance, the high...
متن کاملA 125-MHz Mixed-Signal Echo Canceller for Gigabit Ethernet on Copper Wire
A discrete-time analog echo canceller is described that reduces the echo in the front end of Gigabit Ethernet twisted-pair interfaces. Echo cancellation in the analog domain by means of four taps reduces the complexity of the digital echo canceller and crosstalk cancellers. Designed in a 0.4m CMOS technology, the circuit employs an LMS algorithm to adapt to the cable length and impedance discon...
متن کاملA Highly Linear 125-MHz CMOS Switched-Resistor Programmable-Gain Amplifier
A highly linear programmable-gain amplifier (PGA) is fabricated using a 0.35m CMOS technology. High linearity and constant wide bandwidth are achieved by using a high-gain amplifier with low input impedance and resistor-network feedback. The voltage gain is varied by digitally controlling the input switched resistors. The distortion of a switched resistor has been analyzed using the Volterra se...
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ژورنال
عنوان ژورنال: IEEE Transactions on Instrumentation and Measurement
سال: 1986
ISSN: 0018-9456,1557-9662
DOI: 10.1109/tim.1986.6499117