Amplitude Modulation Details TRIZ Cases
- Power Amplifier Supply Modulation Using Open-Loop Valley Regulation
Valley detection adjusts power amplifier supply voltage to track AM signal envelopes, cutting headroom loss while maintaining reliable operation.
- Quadrature AM Noise Estimation for Pulse Interference Suppression
Quadrature demodulation estimates overlapping pulse noise in AM radio signals and removes it by spectral subtraction without extra antennas.
- Zero-IF Transmitter Decoupling Stage for Noise and LO Leakage
An intermediate decoupling stage between the mixer and gain stage cuts noise and power use while stabilizing I-Q mismatch and LO leakage.
- AM Signal Noise Estimation via Quadrature Spectral Subtraction
Quadrature-based noise estimation and spectral subtraction suppress dense EV pulse interference in AM radio receivers without extra antennas.
- Zero-IF Transmitter Decoupling for Low-Noise Gain Control
An intermediate decoupling stage between the mixer and gain stage cuts noise and power use while stabilizing I-Q mismatch and LO leakage.