Loudspeaker protection circuit

A loudspeaker protection circuit comprising:

• a rectification stage, including a bridge rectifier circuit, for receiving an input audio signal and producing a rectified output signal;
• a detection stage, including a voltage divider circuit, for passing the rectified output signal when the rectified output signal is greater than a predetermined level;
• a timing stage, including a two-stage, retriggerable, charge-up resistive capacitive timer network, for receiving the rectified output signal from the detection stage and producing a time-varying charge signal;
• a regulation stage, a regulation device and a capacitive smoothing network, for producing a regulated output signal based on the input audio signal;
• an actuator stage, including a driver and an actuator controller, for actuating a switch based on the time-varying charge signal and the regulated output signal;
• an attenuation stage, including a lamp, for attenuating an output audio signal when the switch is actuated;
• and
• a load balancing circuit for balancing the load on the output audio signal when the switch is actuated.

A loudspeaker protection circuit comprising:

• a rectification stage, including a bridge rectifier circuit, for receiving an input audio signal and producing a rectified output signal;
• a plurality of detection stages operating in parallel, each including a voltage divider circuit, for passing the rectified output signal when the rectified output signal is greater than a predetermined level;
• a plurality of timing stages operating in parallel, each including a two-stage, retriggerable, charge-up resistive capacitive timer network, for receiving the rectified output signal from the detection stage and producing a time-varying charge signal;
• a regulation stage, a regulation device and a capacitive smoothing network, for producing a regulated output signal based on the input audio signal;
• a plurality of actuator stages operating in parallel, each including a driver and an actuator controller, for actuating a switch based on the time-varying charge signal and the regulated output signal;
• a plurality of attenuation stages operating in series, each including a lamp, for attenuating an output audio signal when the switch is actuated;
• and
• a load balancing circuit for balancing the load on the output audio signal when the switch is actuated.