lm2421 National Semiconductor Corporation, lm2421 Datasheet - Page 3

• Manufacturer Part Number: lm2421
• Description: Monolithic Triple Channel Hdtv Driver
• Manufacturer: National Semiconductor Corporation

AC Test Circuit
DS200233-3
Note: 8 pF load includes parasitic capacitance.
FIGURE 2. Test Circuit (One Channel)
Figure 2 shows a typical test circuit for evaluation of the LM2421. This circuit is designed to allow testing of the LM2421 in a 50
environment without the use of an expensive FET probe. The two 4990 resistors form a 400:1 divider with the 50 resistor and
the oscilloscope. A test point is included for easy use of an oscilloscope probe.The compensation capacitor is used to
compensate the stray capacitance of the two 4990
resistors to achieve flat frequency response.
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