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An RF front-end that could handle strong to weak input signals without the need for a low-noise amplifier, for use in a terrestrial wideband TV tuner IC, was designed and its performance was measured. It was found to exhibit >20 dB attenuation at the image frequency by implementing a 6th-order band-pass filter from 90 to 770 MHz with an autotuning function. The measured noise figure at IF output...
This paper presents an inverter-based switched-capacitor integrator for 0.5 V low-voltage applications. The proposed integrator utilizing floating voltage source and forward body bias obtains high performance as well as good independence of variations in process and temperature. It is applied to a 0.5 V feedforward AD modulator. The test results indicate that the designed AD modulator achieves a peak...
We present a transformer noise-canceling ultra-wideband (UWB) CMOS LNA based on a common-gate topology. A transformer, composed of an input inductor and shunt peaking inductor, partly cancels the noise originating from a common-gate transistor. The combination of the transformer with an output series inductor provides wideband input impedance matching. The LNA, implemented with 90-nm digital CMOS...
We have developed a high speed dynamic threshold voltage MOSFET named B-DTMOS for ultra low power operation. This was realized using a bulk wafer containing an individual trench isolated shallow-well with a high concentration buried layer sandwiched between two low concentration layers surrounded by a deep well. The B-DTMOS achieved an excellent propagation delay time of 83.6 psec at 0.6 V operation...
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