Tandy 1000 SL Technical Reference Manual page 231

Waveforms
Power Converter Circuit
'
Ton 'Toff
'
Collector Voltage Waveform
Collector Current Waveform
The input and output voltage are represented by the
following equations:
Vo = n
x vf
Vo
:
Output voltage
n
:
Turn ratio of the transformer T 1
Vf
:
Collector Voltage at turn-off time
Vin x
Ton
= Vf x
Toff
vin
:
Input voltage
Ton : Turn-on time of transistor
Toff: Turn-off time of transistor