JVC RX-D702 Technical Manual page 52

Hybrid Feedback Digital Amplifier Hybrid Feedback Digital Amplifier
JVC technologies for satisfying the THX Ultra2 certification
High-Precision PWM Modulator
High-Precision Triangular Waves
Distortion or irregular angles of the triangular waves
lower the precision of PWM signals, which results in
lower sound quality. The JCV8015 uses high-precision
triangular waves to prevent the problem.
Input Audio
Signals
High-Precision
Triangular Waves
Synchronization by an External Clock
Slight gap of frequencies among channels causes specific noise. To prevent this, the JVC amplifier uses
an external clock, which synchronizes the operations of all channels. Noise is also generated when the unit
receives AM signals whose frequency overlaps that of audio signals. The external clock detects this and
automatically modifies the audio signal frequency of all the channels simultaneously, thus preventing the
noise generation.
Ver. III Ver . III
JCV8015 Benefits (2) -- PWM Modulator/External Clock
JCV8015 Benefits (2) -- PWM Modulator/External Clock
Ultra-High-Speed
Comparator
Ultra-High-Speed Comparator
Comparison of audio signals with the triangular waves
is done by "comparator". The JVC amp features an
ultra-high-speed comparator. This prevents the
possible delay of PWM signals with respect to audio
signals, which causes distortion.
PWM
RX-D702 RX-D402
*Also applies to RX-D401
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