| 摘要 |
A high magnitude potential supply comprises a first circuit (220, 224) f or generating a first signal related to an output high magnitude potential (KV) across a pair of output terminals (113 and ground) of the supply, a second circuit (210, 218) for generating a second signal related to a desired output current from the high magnitude potential supply, and a third circuit (Q2B, Q2C, Q7 and associated component s) for supplying an operating potential (VCT) to the high magnitude potential suppl y so that it can produce the high magnitude operating potential. The third circuit has a control terminal (COMP terminal of 86). The supply further comprises a fourth circui t (86) coupled to the first (220, 224) and second (210, 218) circuits and to the control terminal (COMP terminal of 86). The fourth circuit (86) receives the first and second signals from the first (220, 224) and second (210, 218) circuits and controls the operating potential supplied to the high magnitude potential supply by the third circu it (Q2B, Q2C, Q7 and associated components). The supply further comprises a fifth circuit (84, 240, 242, 244) for disabling the supply of operating potential to the high magnitude potential supply so that no high magnitude operating potential can be supplied by it. The fifth circuit (84, 240, 242,244) is also coupled to the control terminal (COMP terminal of 86).
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