JVC RX-D402, RX-D702, RX-D401 High-PrecisionPWM Modulator, Synchronization by an External Clock

Hybrid Feedback Digital Amplifier Ver. III

JVC technologies forJCV8015satisfyingBenefitsthe THX Ultra2(2) --certificationPWM Modulator/External Clock

JCV8015 Benefits (2) -- PWM Modulator/External Clock

RX-D702 RX-D402

*Also applies to RX-D401

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.

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.

Ultra-High-Speed

Comparator

Input Audio

Signals

High-Precision

Triangular Waves

PWM

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.

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