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JVC technologies for satisfying the THX Ultra2 certification
Hybrid Feedback Digital Amplifier
Hybrid Feedback Digital Amplifier
Evolution of Hybrid Feedback Digital Amplifier (1)
Evolution of Hybrid Feedback Digital Amplifier (1)
PWM
Modulator
Pre-
Driver
Demodulator
(LPF)
Phase Shift
Master Clock
+
-
IN
RX-D702 RX-D402
Hybrid Feedback Digital Amplifier
Use of two feedback loops eliminates the noise generated at each process:
Digital feedback -- for significantly improving the precision of PWM signal generation.
Analog feedback -- for “brushing up” the waveform of the analog signal at output to match the original.
Digital feedback -- for significantly improving
the precision of PWM signal generation
Analog feedback -- for “brushing up” the waveform of
the analog signal at output to match the original
1
PWM
*Also applies to RX-D401