Transmitting end driving circuit and method
A driving circuit and driving method technology, applied in the direction of TV, electrical components, color TV, etc., can solve the problems of large fluctuation of impedance matching resistance and large fluctuation of driver output current, achieve good impedance matching, facilitate on-chip integration, The effect of reducing negative effects
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[0084] Such as figure 1 As shown, this embodiment provides a sending end driving circuit 1, and the sending end driving circuit 1 includes:
[0085] Calibration control unit 11 , current calibration unit 12 , bias voltage generation unit 13 , output stage drive unit 14 and impedance matching unit 15 .
[0086] Such as figure 1 As shown, the calibration control unit 11 is used to generate a calibration control signal RTRIM[5:0] that varies with changes in process, power supply voltage and temperature.
[0087] Specifically, the calibration control unit 11 gradually adjusts the resistance value of the built-in first resistor array approaching the external reference resistor gradually based on the successive approximation method, and finally the two keep the same, and sends the control signal of the first resistor array to output as the calibration control signal RTRIM[5:0]. In this embodiment, the calibration control signal is a 6-bit control bus signal, and the number of bit...
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