| 摘要 |
PCT No. PCT/EP88/00369 Sec. 371 Date Dec. 4, 1989 Sec. 102(e) Date Dec. 4, 1989 PCT Filed May 4, 1988 PCT Pub. No. WO89/11124 PCT Pub. Date Nov. 16, 1989.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 in response to a switching or control transistor (T8). 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 output voltage is back to a transistor of the input amplifier (T7). The diode (D) may be replaced by a transistor (T, FIG. 2).
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