Improved Gonda's circuit described

In 1977, Japanese researchers Gonda, et al. presented a new high-voltage power supply circuit for use in photomultiplier tubes (PMT) which attracted quite a bit of public attention. Some persons in China developed a PMT high-voltage power supply based on Gonda's presentation. However, the output voltage of the Gonda circuit can only reach around 1000 V, but most of the PMT mode in China and abroad require a power supply voltage greater than 1000 V, and many require more than 1500 V. A PM-2 high-voltage power supply which improves the Gonda circuit while preserving its superior features was designed.