Abstract: A receiver termination circuit includes an internal AC coupling capacitor and an adjustable resistor forming an adjustable high-pass filter (HPF) at a receiver side of a transmission medium, and a digital-to-analog converter (DAC) coupled to the adjustable HPF, the DAC configured to provide a signal having a low-pass filter response to the adjustable HPF to provide a DC restore function.

Abstract: A receiver termination circuit includes an internal AC coupling capacitor and an adjustable resistor forming an adjustable high-pass filter (HPF) at a receiver side of a transmission medium, and a digital-to-analog converter (DAC) coupled to the adjustable HPF, the DAC configured to provide a signal having a low-pass filter response to the adjustable HPF to provide a DC restore function.

Abstract: A method of capturing user control inputs for an electronic device comprises sampling an input measurement signal at a capacitive input sensor of the electronic device to capture user control inputs for operating the electronic device. Electromagnetic interference affecting the sampling or the input measurement signal is electronically neutralized.

Abstract: A method of capturing user control inputs for an electronic device comprises sampling an input measurement signal at a capacitive input sensor of the electronic device to capture user control inputs for operating the electronic device. Electromagnetic interference affecting the sampling or the input measurement signal is electronically neutralized.

Abstract: A method of capturing user control inputs for an electronic device comprises sampling an input measurement signal at a capacitive input sensor of the electronic device to capture user control inputs for operating the electronic device. Electromagnetic interference affecting the sampling of the input measurement signal is electronically neutralized.

Abstract: A driver circuit for driving a light source of an optical pointing device includes a first transistor coupled to the light source. The driver circuit includes a controller coupled to the first transistor for monitoring a first current through the light source, comparing the first current to a reference current, and generating a control signal based on a result of the comparison, wherein the control signal causes the first transistor to change the first current.

Abstract: A driver circuit for driving a light source of an optical pointing device includes a first transistor coupled to the light source. The driver circuit includes a controller coupled to the first transistor for monitoring a first current through the light source, comparing the first current to a reference current, and generating a control signal based on a result of the comparison, wherein the control signal causes the first transistor to change the first current.

Abstract: In accordance with the present invention, a magneto-resistive head read amplifier circuit is provided which can be incorporated into a magnetic reader for reading information stored in magnetic form on a storage medium. The magneto-resistive head read amplifier of the present invention incorporates an inductor in the bottom current drain of the head read amplifier circuit which reduces or eliminates noise generated by the bottom current source transistor of the head read amplifier circuit. In accordance with a first embodiment of the present invention, the magneto-resistive head read amplifier is a single-polarity head read amplifier circuit which utilizes a bias current having a particular polarity. In accordance with a second embodiment of the present invention, the magneto-resistive head read amplifier is a dual-polarity head read amplifier circuit capable of operating with bias currents of opposite polarity.

Abstract: The present invention provides a write driver circuit for use in a magnetic read/write system for writing information to a magnetic storage medium. In accordance with a first embodiment of the present invention, the write driver circuit comprises a variable common mode circuit component for enabling the common mode output voltage of the write driver circuit to be varied and/or set to a preselected value. In accordance with a second embodiment of the present invention, the write driver circuit comprises a variable damping resistance circuit component for enabling the damping resistance of the write driver circuit to be varied and/or set to a preselected value in order to optimize write current rise time and overshoot.