A mark-space generator circuit(脉冲调制电路)
Although this was not an origional idea of the "D14 article" either.
I have seen Previous designs of this before, even in Old Tube Designs.
However, Due to numerous requests I designed a PCB for it,
and in the process I also made a few minor changes,
1) Because 3 Position switches are not very common,
I incorporated Centre Off, Spdt Toggle Switches.
2) Added some high frequency filtering capacitors to the supply.
3) A higher power mosfet for the output.
4) An Optional bypass diode across the output.

图 脉冲调制电路(点击看原图)
