Set a base reverse saturation current is due to the collector junction is reverse biased, collector-base region and 68 datasheet and the drift of minority carrier movement formed by the current, so it influenced by temperature. At room temperature, low-power germanium tube Iaro about a few microamps to tens of microamps, low-power silicon tube ICBO microamps or less. ICa0 the smaller the better temperature stability, so many events that use silicon tube. 69. Several typical N-channel JEFT what applications? CS4868 is used as low-noise audio and 68 price and sub audio amplification JEFT; CS4393 is used as analog switches, chopping with the N-channel JEFT; CS146 at 400 MHz below the high input impedance circuit to do with the high-frequency amplification N-channel JEFF; D2302 for weak signals, low-noise preamplifier ...