Hi All,
I am looking at building an astable multivibrator using an ne 555. While looking for circuits I came accross one that allowed for independantly controlliing the on and off times, by providing a separate charge and discharge path to the capacitor by using blocking diodes.
Another website talked about that circuit and said that they had to be fast diodes if it is going to be used at high frequencies.
My question is this.
Take a diode like IN1007. Used as a blocking diode, would this or any other cheap common diode, block instantaneously or do they take some time to establish that blocking action. If so then the higher the frequency probably the less blocking occurs. Most time I here the word fast with diodes it is usually talking about the recovery time. Does this mean recovery from an avalanch type reverse breakover situation. Can someone please explain recovery time and do diodes that are not fast delay before blocking.
Thanks in advance
Wil.
I am looking at building an astable multivibrator using an ne 555. While looking for circuits I came accross one that allowed for independantly controlliing the on and off times, by providing a separate charge and discharge path to the capacitor by using blocking diodes.
Another website talked about that circuit and said that they had to be fast diodes if it is going to be used at high frequencies.
My question is this.
Take a diode like IN1007. Used as a blocking diode, would this or any other cheap common diode, block instantaneously or do they take some time to establish that blocking action. If so then the higher the frequency probably the less blocking occurs. Most time I here the word fast with diodes it is usually talking about the recovery time. Does this mean recovery from an avalanch type reverse breakover situation. Can someone please explain recovery time and do diodes that are not fast delay before blocking.
Thanks in advance
Wil.