The operation of a ramp type Digital Voltmeter is based on the principle of
(A) Voltage-to-current conversion.
(B) Voltage-to-time conversion.
(C) Current-to-time conversion.
(D) Current-to-frequency conversion.
(A) Voltage-to-current conversion.
(B) Voltage-to-time conversion.
(C) Current-to-time conversion.
(D) Current-to-frequency conversion.