grandestlama
New Member
I have gone a long way with my UPS design and construction. Often times people aim at producing a "sine-like" wave form.
I was wondering why not produce a sinusoidal oscillation and amplify with BJT's or MOSFETs and use this to drive the step up transformer primary ? Instead, the transistors are usually biased to operate as switches (not as amplifiers). Is this because a digital pulse is used as the source of the oscillation ? If yes then why is nobody replacing the NE555 astables or SG3524 PWM osclilators with sinusoidal oscillators and using the transistors in the linear region for amplification instead of switching ?
Please if you know why just post a reply no mater how amateurish my question is !
THANKS
I was wondering why not produce a sinusoidal oscillation and amplify with BJT's or MOSFETs and use this to drive the step up transformer primary ? Instead, the transistors are usually biased to operate as switches (not as amplifiers). Is this because a digital pulse is used as the source of the oscillation ? If yes then why is nobody replacing the NE555 astables or SG3524 PWM osclilators with sinusoidal oscillators and using the transistors in the linear region for amplification instead of switching ?
Please if you know why just post a reply no mater how amateurish my question is !
THANKS