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- W1520065319 abstract "A high accurate current amplifier with very precise logarithmic transfer characteristic and extreme high temperature stability is presented. The application of such an amplifier lies on the field of optoelectronic signal processing. With a photo diode connected to the input of the amplifier it is possible to measure any light levels very precisely. The presented circuitry consists of a low leakage current input stage with fixed amplification, a high performance low noise logarithmic amplifier and a low voltage drop current output stage. High temperature stable reference current is generated on chip by a bandgap reference. Minimum input signal level goes down to some 100pA, maximum input signal level up to some 10/spl mu/A. The high precision logarithmic transfer characteristic exceeds four decades, the precision is within 1% over the complete range. The output current is in the order of some 100/spl mu/A, its temperature variation is lower than 3/spl mu/A over the wide temperature range from -40/spl deg/C to 100/spl deg/C. Current consumption of the sensor circuitry is as low as 670/spl mu/A which makes it applicable for low power systems. The circuitry is realized in a standard 0.6/spl mu/m BiCMOS technology on a total chip area of only 1.46mm/sup 2/." @default.
- W1520065319 created "2016-06-24" @default.
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- W1520065319 date "2005-12-10" @default.
- W1520065319 modified "2023-09-24" @default.
- W1520065319 title "A high accurate logarithmic amplifier system with wide input range and extreme low temperature coefficient" @default.
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- W1520065319 doi "https://doi.org/10.1109/esscir.2005.1541615" @default.
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