3.2.1 Logarithmic amplifiers The logarithmic amplifier selected for the envelope detection is the AD8310. We require that the system have a dynamic range of at least 80 dB, and we want the entire system to hve a latency of 0.5 ps. The device (AD8310 logarithmic amplifier) fits our requirements, as it
required to only one end of the cable as long as the other end is open or • Substituting the SOIC AD8310 for Figures 4(E) and 4(F), p 27-4. The difference the AD8307 would eliminate the between Figure 4(F) and the Bruene bridge, as shorted. unity gain buffers since there are shown in Figure 4(E), is the addition of R1 which The other way of measuring cable buffers in the AD8310. This would improves the low frequency directivity of the loss, which is typically more accurate, is also allow use of the 8 pin LMC662 Bruene bridge. the insertion loss method. Connect an RF in place
Bild
