Queation about PRS again! | Cypress Semiconductor
Queation about PRS again!
I am first in this Community and know that this community will be helpful for our research members.
The man who asked a question about PRS is my research member. After I read your advice, you need more detail information about our problems.
Until now we have developed for the EMR(electromagnetic resonance) tablet device with Psoc3. In the system, in order to drive the coil to emit electromagnetic power from coil to pen(LC circuit) like a wireless power transmittion, we used PWM signal frequency pulse. After driving PWM pulse to coil driver, the response voltage signal of drive coil shows sine wave.
But this driving condition has some problems because the pen LC condition( or resonance frequency) changed due to some reasons but we don't know the exact resonance frequency. Under this conditon, we have to transmit maximum power to pen. To overcome this problem, we decided that if we send broad band waveform(from 450KHz to 500KHz) such as pseudo random pulse,we can send more energy under miss match between the driving frequency and pen natural frequency. I think if we understand more about Pseudo random pulse generation configuration, we can make such signal.
So I ask for followings if you can support,
1. More examples to control PRS
2. if PRS does not support our problems, I think we can make bit stream like a PRS by using shift register ways. Is there any case study about making bit stream by using predefined user data.
ps. The harmonic composent of PRS signal is not important becase only fundamental frequency is transmitted to pen due to analog circuit ie the square wave changed into sine wave.