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@ FVM
"The assumption, that laser diodes designed for continuous operation can take short pulses of higher current may be wrong."
But Can Pulsed Laser Diode be used with short pulses of current higher than the max. rated pulse current?
@ Keith
While driving the pulsed laser diode using...
I have changed the pcb layout and with the new pcb layout the sinusoidal oscillations on the output are gone but now there exist sinusoidal bursts in the output with random time spacing. Please see the attached images. The images contain the same output waveform with decreasing time scale...
@ FvM
I read somewhere that It is possible to use op amps that are not unity-gain stable in transimpedance circuits provided that the noise-gain at the intersection of the noise-gain curve with the open-loop op amp gain is greater than the minimum gain specified for the op amp.
I have roughly...
What should be the PCB layout considerations for good performance. I am designing the amplifier for 100MHz bandwidth. should i use ground plane? i can only have a single sided PCB.
I have already tried this. Adding More Capacitance increases the amplitude of oscillations.
Which opamp is...
thanks sir for your quick replies.
Then what could be the cause of the observed oscillations. does it have to do something with the pcb layout? How can i improve the stability of the circuit if it is not totally stable?
The photodiode used is AEPX65 having a capacitance of 4pF at +5V bias voltage and responsivity of 0.45A/W at 750nm. The 10Vp-p oscillations are removed with feedback resistor of 2.7k and feedback capacitor of value 1pF (These are also the values obtained from simulation of the circuit for...
Hi! i am working on the design of photodiode transimpedance amplifier of 100MHz using OPA657 Opamp. The first time when i switched on the power to the circuit, there were high frequency sinusoidal oscillations of about 10Vp-p. These Oscillations were removed after i tuned the feedback capacitor...
Hi!
I am working on the design of Photodiode Transimpedance Amplifier. Can anyone tell me how can i test the bandwidth of Photodiode Transimpedance Amplifier without having any spectrum or network analyzer?
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