E
enzino
- Jan 1, 1970
- 0
Hallo
I'm new here
I'm designing a special integrator with an operational amplifier LM6172in in
inverting configuration.
Rin = 1Kohm
On the feedback loop there is a 220pF capacitor.
The non-inverting input is connected to ground.
The problem is that I need a reset every 1us, and the reset operation should
be no longer than 0.2us.
I've tried with some analog switch, but these were too slow !
I've tried with the 2n3819 fet, but the control signal pass to the rest of
the integrator circuit, vanishing the results.
How can I design this circuit?
Which the correct component to perform the reset operation?
Ideally the reset operation may be realized with a variable resistor
connected to the operational output and the inverting input, in parallel
with the 220pF capacitor.
During the integration, the variable resistor should be set at extremely
high values (for example 1Mohm).
During the reset operation, the variable resistor should be set at low
values (for example 10 ohm).
Which component is able to perform this task at a rate of 1 Mhz?
Some idea?
I'm new here
I'm designing a special integrator with an operational amplifier LM6172in in
inverting configuration.
Rin = 1Kohm
On the feedback loop there is a 220pF capacitor.
The non-inverting input is connected to ground.
The problem is that I need a reset every 1us, and the reset operation should
be no longer than 0.2us.
I've tried with some analog switch, but these were too slow !
I've tried with the 2n3819 fet, but the control signal pass to the rest of
the integrator circuit, vanishing the results.
How can I design this circuit?
Which the correct component to perform the reset operation?
Ideally the reset operation may be realized with a variable resistor
connected to the operational output and the inverting input, in parallel
with the 220pF capacitor.
During the integration, the variable resistor should be set at extremely
high values (for example 1Mohm).
During the reset operation, the variable resistor should be set at low
values (for example 10 ohm).
Which component is able to perform this task at a rate of 1 Mhz?
Some idea?
