Hi all,
I was watching the video below where the 74AC14 is used to generate a fast rise time pulse for a TDR application.
#88: Cheap and simple TDR using an oscilloscope and 74AC14 Schmitt Trigger Inverter
I have three questions regarding this circuit:
1) The first inverter is used as an oscillator to generate pulses at a per-defined frequency, but I didn't quite understand why the other inverters are used. Are they somehow helping in getting a faster rise time at the output? If so, how?
2) Since for a TDR, only one rising edge is required, why use the first inverter as an oscillator? Why not make it to generate just one rising edge (ex: when a switch is pressed)?
3) Will the circuit below achieve the same fast rising edge?
I was watching the video below where the 74AC14 is used to generate a fast rise time pulse for a TDR application.
#88: Cheap and simple TDR using an oscilloscope and 74AC14 Schmitt Trigger Inverter
I have three questions regarding this circuit:
1) The first inverter is used as an oscillator to generate pulses at a per-defined frequency, but I didn't quite understand why the other inverters are used. Are they somehow helping in getting a faster rise time at the output? If so, how?
2) Since for a TDR, only one rising edge is required, why use the first inverter as an oscillator? Why not make it to generate just one rising edge (ex: when a switch is pressed)?
3) Will the circuit below achieve the same fast rising edge?