Take a look at TIPD108 (design document here ) which is a circuit that converts an analog input signal into a PWM waveform. There is a section on a triangle wave oscillator design, and the parts selection portion of the document has requirements for the…
Hi Ahmed, You're welcome! Most MCUs can generate PWM signals, and a discrete PWM generator can be created using TI components by following the design in this reference circuit (SBOA212A) and this Reference design (TIPD108) . This circuit generates a 500kHz…
Hi Saif,
The bandwidth of the circuit will depend on the frequency of your input signal. The input signal in your case will be a light source for the photo-diode to detect. For example, in the design file a test to verify performance of the design was…
Hello,
I am trying to implement simulation of SLAU508 Analog Pulse Width Modulation, but modifying it for ac-coupled input. I removed R2 from the circuit, per app not, but then the output only generates PWM output on the negative-going half of the input…
Hi Rock,
the errors of this circuit can very easily be simulated. In the following simulation R1, R2, R3 and R4 shall be free of any error:
Everything is fine. The error of output voltage is almost zero.
But when you assume production tolerances…
Hi Zhaowen,
as I said before you run the INA190 with a way too high shunt resistance for which the INA190 wasn't designed for.
Here is a much better approach with a TIA. See this very nice appnote:
tidu535.pdf
Can you tell more about your application…
Hi Archie,
ArTzy said: Trying the LM7705 but that increases noise in the circuit.
The LM7705 doesn't increase the noise when being decoupled and filtered properly. As an example: I have a circuit being powered by the LM2674 switcher amplifying 100nV…
Part Number: OPA320
Hi all,
I am reading the "1 MHz, Single-Supply, Photodiode Amplifier Reference Design" application note and have a question about the pole mentioned on Page 5. Why the R in parallel with C gives a pole of 1/2pi*C*R?
Thanks. …
