Recording head that detects temperature information corresponding to a plurality of electro-thermal transducers on the recording head and recording apparatus using the recording head

Abstract

A recording head is provided that detects temperature information corresponding to a plurality of electro-thermal transducers. The recording head includes a driving circuit that performs driving by dividing a plurality of heaters into a plurality of blocks and supplies electric current on a block-by-block basis based on recording data. A constant current source applies a common bias current to each temperature sensor group obtained by dividing temperature sensors disposed in correspondence to each heater of a plurality of heaters into blocks. A voltage output circuit is further included having a switching element turns an electric current supply to the temperature sensors of the selected temperature sensor group ON and OFF, and of which obtains a voltage generated at both terminals of the selected temperature sensor by supplying an electric current to the temperature sensor; and an amplifier circuit amplifying the detection voltages.