| 摘要 |
PURPOSE: A driver circuit is provided, which provides a high output driving voltage range while using a transistor having a low voltage tolerance. CONSTITUTION: The driver circuit(100) outputs one of the first analog signal and the second analog signal within the first voltage range from a high voltage(V1) to a low voltage(V2) and within the second voltage range from a high voltage(V3) to a low voltage(V4). The driver circuit comprises the first DAC(Digital Analog Converter)(106) connected to receive the first digital input signal corresponding to the first voltage range, and the second DAC(108) connected to receive the second digital input signal corresponding to the second voltage range, and an output port(114), and the first gating circuit(110) connected between an analog output of the first DAC and the above output port, and the second gating circuit(112) connected between an analog output of the second DAC and the above output port. When the first digital input signal has an amplitude corresponding to the first voltage range and the second digital input signal has an amplitude of the output of the second DAC, the first analog voltage is an output by the first DAC on the output port. And when the second digital input signal has an amplitude corresponding to the second voltage range and the first digital input signal has an amplitude of the output of the first DAC, the second analog voltage is an output by the second DAC on the output port.
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