Adjustable dynamic range signal detection circuit

A circuit, comprising:

• a sensor configured to receive an input signal and to provide a sensor output signal in response to the received input signal;
• a mirror circuit configured to receive the sensor output signal from the sensor and to generate a mirror circuit output signal, the mirror circuit increases a magnitude of the mirror circuit output signal based on increases of the sensor output signal and before the mirror circuit reaches a saturation value;
• at least one other mirror circuit configured to receive the sensor output signal from the sensor and to generate at least one other mirror circuit output signal, the at least one other mirror circuit output signal is generated in response to the sensor output signal and if the sensor output signal is above a threshold value, the mirror circuit output signal and the at least one other mirror circuit output signal are combined to generate a detection signal to indicate a signal strength of the sensor output signal;
• wherein each of the mirror circuit and the at least one other mirror circuit includes a pair of transistor switch devices coupled via a common gate connection, the pair of the transistor switch devices include a length parameter that defines a current capability of the transistor switch devices;
• wherein one of pair of transistor switch devices for the mirror circuit is configured with a length parameter that is greater than the length parameter of another pair of transistor switch devices for the at least one other mirror circuit.

A method, comprising:

• providing a sensor output signal in response to a received input signal;
• generating separate mirror circuit output signals from separate mirror circuits in response to signal variances of the sensor output signal, wherein each of the separate mirror circuit output signals are generated in response to different signal levels of the sensor output signal;
• and
• generating a signal strength indication for the input signal based on monitoring of the separate mirror circuit output signals.