Amplifiers – With semiconductor amplifying device – Including current mirror amplifier
Patent
1998-04-03
1999-06-22
Pascal, Robert
Amplifiers
With semiconductor amplifying device
Including current mirror amplifier
330293, 330311, H03F 304
Patent
active
059146397
ABSTRACT:
A stage for the amplification of high frequency signals (HF) or intermediate frequency (IF) signals comprises a referenced non-differential input. The input of the amplifier is made on the emitter of an input transistor mounted in a common-base connection, converting the input voltage variations into current variations with a non-linear transfer curve that is, in principle, exponential or quadratic, these current variations being themselves copied, with a change in sign, into a second transistor and then converted by a third transistor into voltage variations with a non-linear transfer curve that is reciprocal to the previous one, this curve being in principle a logarithmic or square-root curve, and the voltage at the terminals of the third transistor being used as a feedback applied to the base of the first transistor. Application to the making of HF or IF input amplifier stages having a low noise factor and a wide dynamic range.
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David J. White, 1990 IEEE Nuclear Science Symposium Conference Record, vol. 1 of 2, pp. 580 to 583, "Analogue Front End Electronics for the Zeus Central Tracking Detector", Oct. 22, 1990.
"Thomson-CSF"
Choe Henry
Pascal Robert
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