# Effect of load in double limiter diode Circuit

#### aragon1971

Joined Apr 7, 2008
130
Hi
with two diode and two dc source
from the simulation i see that the load resistor effect the output waveform
in the case of big load (10 kΩ) the output wave form is between V1+0.7 ,, -V2-0.7
this not happen for small load

there a explanation ??

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#### crutschow

Joined Mar 14, 2008
33,348
I don't know what that file is.

#### WBahn

Joined Mar 31, 2012
29,501
Hi
with two diode and two dc source
from the simulation i see that the load resistor effect the output waveform
in the case of big load (10 kΩ) the output wave form is between V1+0.7 ,, -V2-0.7
this not happen for small load

there a explanation ??
What is a "douple limiters" circuit? What is it supposed to do?

Please post a schematic of the circuit and the simulation results (a screen shot is fine).

#### aragon1971

Joined Apr 7, 2008
130
The douple limiter is the circuit with two diode like ths foto

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#### BobTPH

Joined Jun 5, 2013
8,103
Looks like it is working correctly. The two 1K resistors halve the input to 5V peak. The positive half is limited at ~6.6V, so it is not affected. The negative side is limited to ~3.6V and appears to be doing just that.

#### WBahn

Joined Mar 31, 2012
29,501
The douple limiter is the circuit with two diode like ths foto
I think you mean "double limiter".

To see the effect of the load resistance, remove everything from the circuit except the signal source and the two resistors (replace the capacitor with a short -- at 1 kHz it has an impedance of about 16 Ω, so it is negligible compared to 1 kΩ.

What is the voltage across the load as a function of the load voltage?

Don't simulate it -- calculate it.

#### aragon1971

Joined Apr 7, 2008
130
I think you mean "double limiter".

To see the effect of the load resistance, remove everything from the circuit except the signal source and the two resistors (replace the capacitor with a short -- at 1 kHz it has an impedance of about 16 Ω, so it is negligible compared to 1 kΩ.

What is the voltage across the load as a function of the load voltage?

Don't simulate it -- calculate it.
Looks like it is working correctly. The two 1K resistors halve the input to 5V peak. The positive half is limited at ~6.6V, so it is not affected. The negative side is limited to ~3.6V and appears to be doing just that.
yes! i think when RL increase the output of the limiter is between V1+0,7V and -(V2+0.,7) ?

#### BobTPH

Joined Jun 5, 2013
8,103
Yes, again, as expected.