176
The Tektronix 176 is a pulsed high-current test fixture for the model 576 curve tracer.
The 176 can be considered a more modern replacement for the 175 fixture that worked with the 575 tracer. Both the 176 and the 175 can supply collector currents up to 200 A.
The 175 uses a rectified mains-frequency transformer secondary current to supply the collector current to the device under test. In contrast, the 176 supplies the collector current by passing stored charge through an SCR. This pulsed technique allows the 176 to measure points far from the origin of the I-V curve while keeping the instrument compact and light and the minimizing thermal effects in the device under test.
The 176 weighs 13 pounds (6 kg), whereas the 175 weighs 84 pounds (38 kg). The 176 has a cooling fan, as does the 175 (for different reasons).
Key Specifications
| Collector Sweep | 15 V / 200 A, 75 V / 40 A, or 350 V / 8 A |
|---|---|
| Power limits | 1000 W, 100 W, or 10 W |
| Pulse width | 300 μs or 80 μs; rise time 80 μs, fall time 10 μs |
| Collector current display | 0.1 μA/div to 20 A/div, 1-2-5; ±3% of on-screen value (2 A to 20 A) |
| Base current | Step generator, max. 20 A |
Links
Documents referencing 176
| Document | Class | Title | Authors | Year | Links |
|---|---|---|---|---|---|
| Tekscope 1971 V3 N4 Jul 1971.pdf | Article | Pulsed-Collector High-Current Testing with the 176 | Jim Knapton | 1971 | 176 |
| 48W-3346-3.pdf | Brochure | Making the Correct Semiconductor Measurements Time After Time | 1982 | 576 • 172 • 176 • 577 • 178 • 5CT1N • 7CT1N | |
| 48W-5764.pdf | Brochure | Features Comparison of Tektronix Curve Tracers Versus HP4145A Semiconductor Parameter Analyzer (Tek internal) | Laurie Lawrence | 1984 | 576 • 577 • 176 • 177 • 178 |
Documents referencing Curve tracers
| Document | Class | Title | Authors | Year | Links |
|---|---|---|---|---|---|
| 062-1009-00.pdf | Book | Measurement Concepts: Semiconductor Device Measurements | John Mulvey | 1969 | Curve tracers • Tunnel diodes |
| Tekscope 1969 V1 N1 Feb 1969.pdf | Article | Curve Tracing Displays | 1969 | Curve tracers • 576 | |
| Tekscope 1972 V4 N3 May 1972.pdf | Article | Semiautomatic Testing with the Curve Tracer | Jack Millay | 1972 | 576 • 172 • Curve tracers |
| Tektronix Curve Tracers - Device Testing Techniques.pdf | Book | Tektronix Curve Tracers - Device Testing Techniques | 1985 | Curve tracers • Tunnel diodes |
Pictures
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block diagram
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