Abstract: A switch can be implemented by a switch circuit, which can include a pair of NMOS transistors connected in series as pass-through transistors to transmit an input signal at an input terminal to produce an output signal at output terminal in response to an active state of a switching signal, and a pair of PMOS transistors connected in series as pass-through transistors to transmit the input signal at the input terminal to produce the output signal at output terminal in response to the active state of the switching signal. The switch circuit can also include a switch network connecting, in response to the active state of the switching signal, sources to bodies of the pairs of NMOS and PMOS transistors, and connecting, in response to an inactive state of the switching signal, the bodies of the pair of NMOS transistors to a first reference voltage, the bodies of the pair of PMOS transistors to a second reference voltage, and the sources of the pairs of NMOS and PMOS transistors to a third reference voltage.

Abstract: A switch can be implemented by a switch circuit, which can include a pair of NMOS transistors connected in series as pass-through transistors to transmit an input signal at an input terminal to produce an output signal at output terminal in response to an active state of a switching signal, and a pair of PMOS transistors connected in series as pass-through transistors to transmit the input signal at the input terminal to produce the output signal at output terminal in response to the active state of the switching signal. The switch circuit can also include a switch network connecting, in response to the active state of the switching signal, sources to bodies of the pairs of NMOS and PMOS transistors, and connecting, in response to an inactive state of the switching signal, the bodies of the pair of NMOS transistors to a first reference voltage, the bodies of the pair of PMOS transistors to a second reference voltage, and the sources of the pairs of NMOS and PMOS transistors to a third reference voltage.

Abstract: Improved capacitive sensor operation is achieved with improved discrimination between environmental drift and apparent drift attributable to human proximity to the sensor. A proximity algorithm detects conditions interpreted as indicating a user is close to, but not touching, a sensor. When such proximity is detected, ambient value calibration is halted, thereby avoiding treating the human's proximity as environmental drift requiring compensation and preventing miscalculation of calibration. The proximity algorithm employs two moving-average filters (implemented in hardware or software) to monitor the CDC output values over time and to make appropriate adjustments to a signal representing the ambient, while distinguishing environmental drift from proximity-induced pseudo-drift.

Abstract: A system and method is provided for a high accuracy digital temperature sensor (DTS). The system includes a differential analog temperature sensor based on bipolar junctions, providing an output signal obtained as the difference between the VBE of two bipolar junctions. This signal is converted into the digital domain and compared to N?1 threshold digital values for providing piece-wise linear error correction for the variations with temperature of the different error sources within the DTS. This system and method advantageously improve the accuracy of a DTS over an extended temperature range.

Abstract: A programmable non-volatile data storage calibration circuit stores a calibration code for a temperature sensor circuit of an IC, comprising a programmable array of addressable bi-state, bi-stable first circuit elements each comprising a fusible resistor. A power supply controlled by a data input signal addresses the first circuit elements to be switched from a first to a second state in the fusible resistor state, the supply, and a clock signal applied to an I/O terminal clocks the data input signal to the interpreter circuit. The interpreter circuit sequentially selects and addresses the first circuit elements and enables switching of the first circuit elements when the supply voltage is at its maximum, blowing a selected fusible resistor. A second, similar circuit element is switched to its second state after programming the calibration circuit to prevent its further programming.