I am trying to calculate the power delivered to a resistive load by a simple voltage follower. The kick is that there is a DC bias with the sine wave input.
I would imagine that the instantenous power is the linear sum of the DC and AC components; however, what would the average power calculate out to be? The sum of the RMS current/voltage values of DC and AC components used to then calculate power? Consequently, the RMS value of a constant DC signal is equal to that same DC value after the integral.
Circuit attached.
The TINA sim shows negative power regarding the sinewave input; albeit, biased as Vcc/2. This is not possible, and further more I question the 'linear sum' of components...power is a not a linear process.
I would imagine that the instantenous power is the linear sum of the DC and AC components; however, what would the average power calculate out to be? The sum of the RMS current/voltage values of DC and AC components used to then calculate power? Consequently, the RMS value of a constant DC signal is equal to that same DC value after the integral.
Circuit attached.
The TINA sim shows negative power regarding the sinewave input; albeit, biased as Vcc/2. This is not possible, and further more I question the 'linear sum' of components...power is a not a linear process.
Attachments

36 KB Views: 71