BD4
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The General Electric BD-4 (P/N 152-0070-00) is a 0.1 mA (@90 mV) Germanium back diode. It has a specified rise time of 0.4 ps.
The BD4 is used in the HF-sync circuit of the 7S14 and trigger circuit of the late 5T1A.
Some instruments using part BD4
| Instrument | Manufacturer | Class | Description | Introduced |
|---|---|---|---|---|
| 3T77A | Tektronix | Plug-in | Sampling sweep plug-in | 1966 |
| 5T1A | Tektronix | Plug-in | Timing plugin | 1963 |
| 7S14 | Tektronix | Plug-in | 1 GHz dual-trace, delayed-sweep sampler | 1974 |
Links
- Tunnel diode switching circuits and the back diode. Service Scope No. 38, June 1966 and No. 39, August 1966
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GE back diodes
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BD1 to BD7 back diode data from 1977 GE semiconductor data book
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Tracing BD4 I-V curve on 576 in AC mode
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BD4 I-V curve. Center point on graticule is (0V, 0mA).
