Overdrive Behavior - Stanford Research Systems SIM954 Operation And Service Manual

300 mhz dual inverting driver amplifier

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3 – 18

TDS 3034 28 Jul 2008 13:59:22

Figure 3.11: Common mode voltage at the

ampliﬁer output ground relative to SIM900

mainframe chassis when driving an 8 inch

long stub antenna with a 4 V

at 10 MHz.

3.9 Overdrive Behavior

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Figure 3.13: The SIM954 driven with 1 kHz

triangle wave to 20 Vpp into 50

square wave

The ampliﬁer exhibits di erent kinds of overdrive behavior depend-

ing on load and frequency. The most basic overdrive condition is a

voltage overdrive on light load as shown in Figures 3.13 and 3.14.

SIM954 300 MHz Dual Inverting Driver Ampliﬁer

TDS 3034 28 Jul 2008 14:00:15

Figure 3.12: Same conditions but with a

275

(at 100 MHz) clamp on cable bead.

The peak amplitde has been reduced by ap-

proximately 6 dB and the ringing is substan-

tially shorter.

TDS 3034 15 Jul 2008 16:01:53

Figure 3.14: The SIM954 overdriven with

1 kHz triangle wave to

Application notes

20 Vpp into 50

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