Hi,
Please assist us in ramping a reference voltage down to zero volts, or back up to the reference voltage. This being done at random times, on demand. The ramp should be over some 200us. It should be linear, but its not too bad if its not that straight….it could even be say in 10 steps (up or down).
The reference voltage could be any level from 0V to 0.5V.
….So eg it could be at, say, 0.23V…and every now and again we would need to ramp it down to zero volts….then some time later, ramp it back up to 0.23V.
Would you agree that the attached method is the best way?
It just uses a microcontroller to PWM the buffered reference voltage…(please ignore RC values) variable PWM to make it ramp over 200us…as discussed, it could be 10 steps, so 10 different duty cycles inside the 200us ramp time.
Please confirm there are no nice analog modules which do this, and no nice sub circuits which can do it better than this?
Please assist us in ramping a reference voltage down to zero volts, or back up to the reference voltage. This being done at random times, on demand. The ramp should be over some 200us. It should be linear, but its not too bad if its not that straight….it could even be say in 10 steps (up or down).
The reference voltage could be any level from 0V to 0.5V.
….So eg it could be at, say, 0.23V…and every now and again we would need to ramp it down to zero volts….then some time later, ramp it back up to 0.23V.
Would you agree that the attached method is the best way?
It just uses a microcontroller to PWM the buffered reference voltage…(please ignore RC values) variable PWM to make it ramp over 200us…as discussed, it could be 10 steps, so 10 different duty cycles inside the 200us ramp time.
Please confirm there are no nice analog modules which do this, and no nice sub circuits which can do it better than this?