| 摘要 |
A voltage-to-current converter configured to operate over substantially the entire range of a power supply voltage signal that is employed to drive the voltage-to-current converter. A closed-loop voltage-to-current converter is configured to provide a first output current signal substantially linearly responsive to a predetermined range of an input voltage signal having values between the low voltage level of the power supply and a predetermined reference voltage signal. An open loop voltage-to-current converter is coupled to the closed-loop voltage-to-current converter. It is configured to provide a second output current signal, substantially linearly responsive to a predetermined range of input voltage signals, having values ranging between the reference voltage level and the high voltage level of the power supply. The first and second output currents are combined to provide the output current signal of the voltage-to-current converter.
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