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The opamps in the circuit shown are ideal, but have saturation voltages of 
.
Assume that the initial inductor current is 
. The input voltage 
is a triangular signal with peak voltages of 
and time period of 
. Which one of the following statements is true?
is delayed by 
relative to 
, and 
is a triangular waveform.
is not delayed relative to , and is a trapezoidal waveform.
is not delayed relative to , and is a triangular waveform.
is delayed by 
relative to , and is a trapezoidal waveform.
OPA1
non-inverting Schmitt trigger
By Voltage Division Rule,
At UTP and LTP, Inverting and Non-Inverting Terminals would have equal voltage
For 
Hence, we can draw wave form like,
Hence, 
is delayed las w.r.t 
.
Only from here we can say option (d) is correct. But to complete analysis
Now, for OPA2,
As is a square wave, we can take it as constant in each period.
Initially 
.
If we take 
in 
,
Now, if 
Then, 
Hence, 
Now, at 
Now, if 
From 
to 
, 
is fixed
Hence, we get a trapezoidal waveform in steady state.