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T1
FP07
NTC
lin
amplifier
linearization
NTC
frequency
compensation
NTCHP
T3
pre-emphasis
NTCAC
T4
High resolution
AC coupled
linear
Figure 3
The block diagram shows the four different function blocks:
- NTC lin is a small circuitry mounted on a 15mm glass feedthrough
with a six pole Lemosa round connector and plugged into the
flange of the microstructure temperature sensor ( please see photo
chapter 7.3). This little board a preamplifier with a linearization of
the nonlinear thermistor characteristic.
- NTC is the circuitry described in figure 2 and contains the
electronic for the FP07 band width extension. The frequency
response of the NTC output is quite linear even beyond the FP07
cut off frequency.
- NTCHP is a pre-emphasized analogue channel with a frequency
dependent gain described in chapter11.2. This output should be
used to achieve better signal to noise ratio at higher frequencies.
The data derived from this temperature has to be de-emphasized
later in order to get right scaled spectra.
- NTCAC is an ac-coupled linear amplifier with the gain G=10. the
description of this circuitry is to be found in chapter11.3.
NTC, NTCHP and NTCAC are located on the analog mainboard:
Document 002.E.05.E sheet 2/5