In voltage comparator circuits CR1 Vo is clamped at -5.1 Vdc, generating a negative feedback voltage, and improving circuit response.

In voltage comparator circuits CR1 Vo is clamped at -5.1 Vdc, generating a negative feedback voltage, and improving circuit response.

• A. Generates a negative feedback voltage
• B. Improves circuit response
• C. Both
• D. Neither

Answer: (C)

Negative feedback happens when a part of the output is fed back into the input in a way that counteracts changes at the input. Here, the diode clamp fixes the output at about -5.1 V. That clamped output is fed back into the input path so it tends to oppose further movement of the input signal. This negative feedback reduces the input error quickly as the circuit transitions, which speeds up the switching and makes the response more predictable. The -5.1 V clamp also sets a defined feedback level, ensuring the feedback is active during switching and helping prevent slow or erratic response. So the clamp both generates a negative feedback voltage and improves circuit response.

Negative feedback happens when a part of the output is fed back into the input in a way that counteracts changes at the input. Here, the diode clamp fixes the output at about -5.1 V. That clamped output is fed back into the input path so it tends to oppose further movement of the input signal. This negative feedback reduces the input error quickly as the circuit transitions, which speeds up the switching and makes the response more predictable. The -5.1 V clamp also sets a defined feedback level, ensuring the feedback is active during switching and helping prevent slow or erratic response. So the clamp both generates a negative feedback voltage and improves circuit response.