This is a fully interactive schematic of an Analog AM
Demodulator. Hover over any stage on the left to view its
technical details and highlight it on the schematic above.
I'm Akshat Jain, studying Engineering Physics at DTU. I'm highly
interested in electronics. Feel free to leave me a message or
connect via the links on the right.
[TP1] V_IN: Modulated Carrier
-
Carrier:
10kHz |
Modulator:
1kHz
-
High-frequency RF signal acts as the base transmission layer.
[STAGE A] Rectifier Front-End
-
Schottky Diode (D1)
performs half-wave
rectification.
-
R1 acts as a soft-clipping
bleed path, preventing abrupt diode cutoff at low amplitudes.
[STAGE K] Pre-Filter & Splitter
-
Passive
LC low-pass filter
(L1, C1).
-
Damped by R2 to suppress
high-frequency RF transients before the delay line. Forms
exact "K" topology.
[STAGE S] Microstrip Delay Line
-
Serpentine trace modeled as a
lumped delay line (Z0=50Ω).
-
Introduces a fixed propagation delay (Δt) for phase alignment
prior to attenuation.
[TP2] V_MID: Envelope Isolation
-
Signal viewed mid-circuit, before final smoothing and full
envelope recovery.
[STAGE H] Pi/H-Pad Attenuator
-
Symmetrical resistive
Pi-network
(R3-R7).
-
Precisely attenuates signal amplitude while maintaining strict
50Ω matching
to prevent reflections.
[STAGE A] Primary Envelope Detector
- The core AM demodulator tracking circuit.
-
D2 acts as a peak series
detector.
-
C2 &
R8 form a parallel shunt to
ground, setting the
RC time constant (τ)
to track smoothly.
[STAGE T] Final T-Section Filter
-
Passive low-pass T-filter (L2, L3, C3).
- Heavily attenuates residual 10kHz carrier ripple.
[TP3] V_OUT: Recovered Analog CV
-
The purely extracted
1kHz analog signal, ready for physical synth processing.