Troubleshooting
4-9
Output stage
Figure 4-4 shows a simplified schematic of the output stage.
The Model 2425 output stage serves two purposes: (1) it converts signals from floating
common to output common, and (2) it provides both voltage and current amplification.
The output stage drive transistors are biased in class B configuration to prevent the possi-
bility of thermal runaway with high-current output values.
Output transistors Q518 and Q521 are cascoded with output MOSFETs Q516 and Q523.
All other MOSFETs and transistors are slaves, and the voltages across these devices are
determined by the resistor-capacitor ladder circuits shown. High-current drive capability
is provided by Q500-Q511. Coarse current limits are built into the output stage.
Содержание SourceMeter 2425
Страница 1: ...Model 2425100W SourceMeter Service Manual A G R E A T E R M E A S U R E O F C O N F I D E N C E...
Страница 3: ...TAIWAN 1FL 85 Po Ai Street Hsinchu Taiwan R O C 886 3 572 9077 Fax 886 3 572 9031...
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Страница 16: ...1 PerformanceVerification...
Страница 35: ...1 20 Performance Verification Model 2425 Service Manual...
Страница 36: ...2 Calibration...
Страница 62: ...3 RoutineMaintenance...
Страница 65: ...3 4 Routine Maintenance Model 2425 Service Manual...
Страница 66: ...4 Troubleshooting...
Страница 84: ...5 Disassembly...
Страница 92: ...6 ReplacementParts...
Страница 113: ...6 22 Replacement Parts Model 2425 Service Manual...
Страница 114: ...A Specifications...
Страница 116: ...B CommandReference...
Страница 128: ...C CalibrationPrograms...
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