Semiconductor device and electronic apparatus

A semiconductor device comprising:

• a first modulation circuit configured to receive a first sound source signal, sigma-delta modulate a signal based on the first sound source signal, and output a first sigma-delta modulated signal;
• a second modulation circuit configured to pulse-width modulate a signal based on the first sigma-delta modulated signal, and output a first pulse-width modulated signal;
• a first modulation inspection circuit configured to inspect the first modulation circuit;
• a second modulation inspection circuit configured to inspect the second modulation circuit;
• a third modulation circuit configured to receive a second sound source signal, sigma-delta modulate a signal based on the second sound source signal, and output a second sigma-delta modulated signal;
• a fourth modulation circuit configured to pulse-width modulate a signal based on the second sigma-delta modulated signal, and output a second pulse-width modulated signal;
• and
• a third modulation inspection circuit configured to inspect the fourth modulation circuit, wherein
• the first modulation inspection circuit, the second modulation inspection circuit, and the third modulation inspection circuit are separated from one another, and
• the first modulation inspection circuit inspects the first modulation circuit and the third modulation circuit.