Abstract: An input-output control circuit, a controller and an air conditioner are provided. The circuit includes a signal input-output end, a first switch module, a first resistor, a second switch module, a second resistor, a third resistor, a fourth resistor, a fourth switch module, a fifth switch module, an amplification module, a sixth switch module and a control module. The control module outputs a first control signal by a first control end to control the on-off of the second switch module, outputs second control signals by a second control end to correspondingly control the on-off of the second switch module and the third switch module, and outputs a third control signal by a third control end to control the on-off of the fifth switch module.

Abstract: An output control circuit, a controller, and an air conditioner are provided. The output control circuit includes a signal input end, a first amplification module, a first power module, a first resistor, a second amplification module, a switch module, and a signal output end. A first input end of the first amplification module is connected to the signal input end. A first input end of the first power module is connected to an output end of the first amplification module and a second input end is connected to a first direct-current voltage source. A first end of the first resistor is connected to an output end of the first power module. A first input end of the second amplification module is connected to the first end of the first resistor and a second input end is connected to a second end of the first resistor.