howland integrator

[ArjunSukumar]

Hi guys,
I want to generate  a sawtooth waveform using an Howland integrator or de boo integrator. I don't know how to proceed with the design. Suggest me any video lectures links or text books which describes the working and design steps
Thanks in advance

[LvW]

Hi guys,
I want to generate  a sawtooth waveform using an Howland integrator or de boo integrator. I don't know how to proceed with the design. Suggest me any video lectures links or text books which describes the working and design steps
Thanks in advance

OK - here is the desription of a DEBOO integrator (based on a Negative Impedance Converter - NIC):
* Take a simple RC first order passive lowpass; time constant T=RC.
* Connect the pos. input node of a non-inverting opamp stage (gain G=1+RN/RL) to this RC lowpass.
* Place another resistor RP between opamp output and pos. input node.
* Make RP*RL/RN=R
* Result: The negative input resistance of the NIC (at the pos. input) Rin=-RP*RL/RN compensates the damping properties of R.
* Integrating function: H(s)=G/sT
* Attention: When this integrator is used as a stand-alone unit (and not within a stabilizing negative overall loop), the ratio RL/RN must be selected slightly larger than R/RP to ensure a stable DC operating point.