Abstract: Systems and techniques are disclosed relating to wireless communications. The systems and techniques involve monitoring a first network in accordance with a first air interface, and receiving a message from a second network through the first air interface, the second network being associated with a second air interface different from the first air interface. Various registration and related techniques are also discussed for maintaining connectivity with both networks as the wireless communications device moves through different geographic coverage regions.

Abstract: An image processing method and analog front end circuit are described. An analog signal is converted to digital form to obtain a digital signal by increasing a conversion resolution value of an analog-to-digital converter module. The digital signal is subsequently amplified to obtain an amplified digital output signal.

Abstract: A method and apparatus for analog-to-digital pipeline conversion are described. The apparatus includes a sample/hold circuit having an input to receive an analog input voltage, a comparator device coupled to the input of the sample/hold circuit to receive the analog input voltage, and a separate gain circuit coupled to an output of the sample/hold circuit and to the comparator device. The sample/hold circuit and the comparator device sample the analog input voltage and the separate gain circuit amplifies an analog residue voltage obtained from the analog input voltage to obtain an amplified analog residue voltage in a first phase of a non-overlapping clock. The analog residue voltage is obtained in a second phase of the non-overlapping clock, when the sample/hold circuit holds the analog input voltage sampled in the first phase, and the comparator device compares the analog input voltage sampled in the first phase with a reference voltage value.

Abstract: Embodiments of a dual input differential amplifier are described. The dual input differential amplifier includes multiple input devices forming at least two sets of differential inputs for an operational amplifier, and multiple switches within the operational amplifier, each switch being coupled to a corresponding input device to switch an active input set of the at least two sets in order to enable a reduction in residual charge associated with switching at an output of the corresponding switch.

Abstract: A method and apparatus for an improved A/D technique, and an architecture utilizing this technique is disclosed. By performing multiple conversions with circuit elements in a different arrangement for each conversion, and combining the results, an A/D technique that has reduced nonlinearities is achieved. By performing conversions in a cyclic architecture a power savings may be achieved.

Abstract: A method and apparatus to generate an optimum common-mode voltage in analog differential circuits are described. A first output voltage is generated as a function of a power supply voltage and a positive saturation voltage in a differential amplifier circuit A second output voltage is then generated as a function of a negative saturation voltage in the differential amplifier circuit. An optimum common-mode level output voltage is then calculated as an average of said first output voltage and said second output voltage to obtain a linear output range of said differential amplifier circuit.