Abstract: A frequency-to-current converter includes several capacitances with capacitive values that are effectively multiplied. After each of a series of periodic pulses, the voltage on a "ramp" capacitance is charged to a starting voltage. Then, during the period preceding the subsequent pulse, the ramp capacitance is allowed to discharge at a discharge rate that is a function of a voltage on a discharge-current bias capacitance. At the end of the period, the voltage on the ramp capacitance is sampled and compared to a reference. If the voltage on the ramp capacitance is too low or too high, indicating a discharge current that is too high or too low, respectively, the bias voltage on the bias capacitance is adjusted to compensate for the error. In another embodiment, a small ramp capacitance is repetitively charged and discharged between two reference voltage levels using alternating charge and discharge current levels.