—A 40-dB dynamic range, dc–4-GHz parallel-summa-tion logarithmic amplifier is presented in this paper. The amplifier realizes a piecewise approximation to an exact logarithmic response. A design procedure that yields breakpoints on the exact response is described, along with delay-matching networks for parallel-summation logarithmic amplifiers. The… (More)
We have developed a MEMS inductor that can be integrated in a conventional RFIC device. The inductor uses surface and bulk micromachining to improve the quality factor and the self-resonance frequency (SRF). The inductor achieved a quality factor greater than 9 and a SRF well above 15 GHz. The inductor is tunable and the inductance variation is greater than… (More)
—A 1.1-GHz fully integrated GaAs MESFET active in-ductor is presented in this paper. Both the inductance and loss resistance are tunable with the inductance independent of series loss tuning. The measured loss resistance is tunable over a 10-to +15-range with a corresponding change in inductance of less than 10% at 100 MHz and less than 4% for frequencies… (More)
This paper reports a single-wafer micromachined radio-frequency (RF) inductor that can be integrated in a conventional RFIC device. The inductor achieved a quality factor greater than 9 at 5Ghz and a self-resonance frequency well above 15 GHz. The inductor is tunable and the inductance variation is greater than 8%.