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\chapter{Electronic Circuits} \label{chap:electronic}

This appendix shows the electronic circuits built for the experimental work. All circuits
are referred in Chapter~\ref{chap:method}.

\begin{figure}[h]
   \center{\includegraphics{rms_circuit.eps}}
   \caption{Electronic circuit diagram of
   RMS computation using the integrated circuit AD536AJQ (Analog Devices).}
   \label{fig:rms_circuit}
\end{figure}

\begin{figure}[h]
   \center{\includegraphics{thermocouple_circuit.eps}}
   \caption{Electronic circuit
   diagram of thermocouple amplifier using the integrated circuit AD595AQ (Analog
   Devices).}
   \label{fig:thermocouple_circuit}
\end{figure}

\begin{figure}[h]
   \center{\includegraphics{filter_circuit.eps}}
   \caption[Electronic circuit diagram of
   anti-aliasing low-pass filter with variable cut-off frequency using the integrated
   circuit OP37GP (Analog Devices).] {Electronic circuit diagram of anti-aliasing
   low-pass filter with variable cut-off frequency using the integrated circuit OP37GP
   (Analog Devices). With this configuration, by varying $R_2$, it is possible to
   obtain Butterworth filter response with cut-off frequencies in the \mbox{3.5--50
   kHz} range.}
   \label{fig:filter_circuit}
\end{figure}

\begin{figure}[h]
   \center{\includegraphics{strain_gauge_bridges.eps}}
   \caption[Configuration of the
   two full Wheatstone bridges formed by the tangential force strain gauges and by
   the feed force strain gauges using integrated circuit \mbox{847-171} and circuit
   board \mbox{435-692} from RS Components.] {Configuration of the two full Wheatstone
   bridges formed by the main cutting forces strain gauges ($X_{11}$, $X_{12}$,
   $X_{21}$, and $X_{22}$) and by the feed force strain gauges ($Y_{11}$, $Y_{12}$,
   $Y_{21}$, and $Y_{22}$), respectively. Each bridge arrangement is connected to a
   strain gauge amplifier, using integrated circuit \mbox{847-171} and circuit board
   \mbox{435-692} from RS Components.}
   \label{fig:strain_gauge_bridges}
\end{figure}
