Window comparator circuit

TABLE 6.3 Characteristic Measurements Made on Window Comparator Circuit... 

Three different measurements were made in order to characterize the performance of this window comparator circuit and show the correlation of the breadboard results to the SPICE models. The three inputs and their SPICE statements are described in detail in Table 6.3. 

The schematic for the window detector circuit is shown in Fig. 6.35. The input signal is modeled by the independent voltage source V IN. The power supplied to the LM111 components in the circuit is 10 V DC. The emitter outputs of the comparators are tied to VEE, which... 

There are many other advantages to using the schematic capture version. The enormous popularity of the Microsoft Windows operating system should attest to the ease of use of a graphics-based interface compared to a text-based interface. One such advantage is automatic documentation. When you simulate a circuit, you automatically have a circuit schematic. This schematic can be incorporated into lab notebooks and reports. In a corporate environment, documentation of this type is extremely important. With the Windows operating system, the schematics can be incorporated into written documents using screen captures. This manual is an example of what can be accomplished. 

The electrical photo response to excitation with a weak laser pulse of 10 ps duration absorbed in the bulk of Si is measured as time-dependent voltage drop across the external resistor Rm. If the time elapsed after the laser pulse is short compared to the RC constant of the circuit, the measured signal can be interpreted as photovoltage. It can be interpreted as photocurrent if the elapsed time is long compared to the RC constant. Figure 4 shows the response of an n-Si electrode in the ns time window to the absorption of a laser pulse of 10 ps duration. The black shaded area in Fig. 3 illustrates the generation of electron-hole pairs by the incident hght inside of the Si material. 

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