A 70 dB SiGe Adjustable True Logarithmic Amplifier

Increasing the input dynamic range is an essential task of microelectronics. Modulators and demodulators must have a wide dynamic range. It allows for reducing intermodulation distortion. "True" type logarithmic amplifier with wide dynamic range and external voltage correction can decide these problems. The article describes methods for improving the parameters of analog-modulators and demodulators. A 70-dB dynamic range, 23 dB voltage gain SiGe parallel-summation logarithmic amplifier with external voltage correction is presented in this paper. The integrated circuit has dimensions of 0.8x0.9 mm
²
and consumes 450 mW from a 5-V supply.