Abstract: An apparatus utilizes multiple strain gauge (“SG”) sensing units which are each disposed adjacent an inner surface of the device housing. Electrical voltage generated by the SGs is amplified by one or more amplifiers to maximize the resolution between a voltage output of an SG when in a non-pressed state and a voltage output of the SG when in a pressed state. Additionally, an electronic circuit is configured to identify a baseline voltage output for an SG over a period of time for comparing to a voltage output for the SG when the SG is in a pressed state such that the pressed state of the SG can be identified by the electronic circuit by comparing a current output voltage of the SG to the identified baseline voltage.

Abstract: An apparatus for sensing user input includes a first strain gauge grouping attached to an inner surface of a housing of a device, and a second strain gauge grouping attached to the inner surface of the housing. The apparatus includes a circuit coupled to the first and second strain gauge groupings, the circuit being configured to: (i) receive a first parameter signal from the first strain gauge grouping in response to user input that interacts with the housing over a location of the first strain gauge grouping, (ii) indicate that a first type of user input has been received in response to receipt of the first parameter signal, (iii) receive a second parameter signal from the second strain gauge grouping in response to user input that interacts with the housing over a location of the second strain gauge grouping, and (iv) indicate that a second type of user input has been received in response to receipt of the second parameter signal.

Abstract: An apparatus utilizes multiple strain gauge (“SG”) sensing units which are each disposed adjacent an inner surface of the device housing. Electrical voltage generated by the SGs is amplified by one or more amplifiers to maximize the resolution between a voltage output of an SG when in a non-pressed state and a voltage output of the SG when in a pressed state. Additionally, an electronic circuit is configured to identify a baseline voltage output for an SG over a period of time for comparing to a voltage output for the SG when the SG is in a pressed state such that the pressed state of the SG can be identified by the electronic circuit by comparing a current output voltage of the SG to the identified baseline voltage.

Abstract: An apparatus utilizes multiple strain gauge (“SG”) sensing units which are each disposed adjacent an inner surface of the device housing. Electrical voltage generated by the SGs is amplified by one or more amplifiers to maximize the resolution between a voltage output of an SG when in a non-pressed state and a voltage output of the SG when in a pressed state. Additionally, an electronic circuit is configured to identify a baseline voltage output for an SG over a period of time for comparing to a voltage output for the SG when the SG is in a pressed state such that the pressed state of the SG can be identified by the electronic circuit by comparing a current output voltage of the SG to the identified baseline voltage.

Abstract: An apparatus for sensing user input includes a first strain gauge grouping attached to an inner surface of a housing of a device, and a second strain gauge grouping attached to the inner surface of the housing. The apparatus includes a circuit coupled to the first and second strain gauge groupings, the circuit being configured to: (i) receive a first parameter signal from the first strain gauge grouping in response to user input that interacts with the housing over a location of the first strain gauge grouping, (ii) indicate that a first type of user input has been received in response to receipt of the first parameter signal, (iii) receive a second parameter signal from the second strain gauge grouping in response to user input that interacts with the housing over a location of the second strain gauge grouping, and (iv) indicate that a second type of user input has been received in response to receipt of the second parameter signal.