| 摘要 |
To stop high-voltage breakdown of a transistor (T1) in an amplifier circuit, a selectively conducting means, e.g. a diode (D), provides a low resistance path via a further transistor (T8) to ground potential (G); upon initiation of breakdown, the diode (D) conducts to block transistor (T1) and prevent damage thereto. The transistor (T1) is part of a multi-stage output amplifier (12) connected to an input differential amplifier (11), the ouput voltage (UA) being fed back to a transistor (T7). The diode (D) may be replaced by a transistor (T). |
