Fm receiver chip demodulation mode conversion means and methods

The present invention relates to apparatus and methods A frequency modulation FM demodulation mode conversion receiver chip. FM receiver chip demodulation mode conversion apparatus comprising: a state control means for alternately generating an output enable control signal and an input enable control signal; output mode control module according to an output enable control signal, generating a demodulation mode indication signal demodulation mode indication signal for indicating the current channel demodulation mode; pin, according to an output enable control signal, and outputs an instruction signal demodulation mode, enable control signal, the input signal demodulation mode according to an input control; input mode control module for a control signal based on the demodulation mode, the current control channel demodulation mode. The present invention may be implemented using a pin function output is achieved stereo or mono demodulation mode and the external control input is used to force mono demodulation functions, reducing the number of pins, reducing the cost and difficulty of chip development.