How do you find the phase lag of the current in this FM demodulation "discriminator" circuit?
Above f, C conducts more; below L conducts more phase leans from 180 away from the one with less conduction only when R is in loop= DCR or ESR or R
Reactive elements always have 90 across them but attenuated off resonance. Only R shifts the phase in a loop.
Always when inside the BW of the transformer.
C3 and C4 are Notch filters with shared L3 to suppress carrier after using slope of BPF to convert FM to AM and thus Diode carrier detect of resulting AM to decode FM