Abstract: Systems and methods pertaining to a digital signal isolator device are described. In one embodiment, the device includes an isolation barrier and two metal support paddles. The isolation barrier contains an organic and/or a semi-organic insulating material with at least one capacitor embedded inside. One of the two metal support paddles is located below a first portion of a bottom surface of the isolation barrier to provide support to the isolation barrier, while the other metal support paddle is located below a second portion of a bottom surface of the isolation barrier to provide support to the isolation barrier.

Abstract: Systems and methods pertaining to propagation of digital data from a transmit side domain to a receive side domain through an intermediate isolation barrier are described. Specifically, a carrier waveform is superimposed upon a first logic level of a digital signal that is referenced to a first local ground. The digital signal with the superimposed first carrier waveform is propagated through the intermediate isolation barrier. On the receive side domain, the propagated digital signal is processed using a second local ground that is different than the first local ground, the processing including the use of the carrier waveform to enforce the first logic level upon an output digital signal generated from the propagated digital signal.

Abstract: A mobile communications handset (12) is capable of connection through two different networks (2, 27). When it is out of contact with its preferred local wireless access system (27), the handset will seek a hand-over to the cellular network (2), and will become registered as a “roaming” handset currently connected to the cellular network (2). The cellular network (2) reports this location information to the call server (28), as it would to the HLR of any normal visiting handset, so that incoming calls to the PSTN (6) destined for the user (12) can be routed by way of the cellular network. Outgoing calls are handled as conventional cellular telephony calls. When contact with a local wireless access system (27) is re-established, the contact information is passed to the call server 28, which reports to the cellular network (2) that a handover has occurred.

Abstract: Systems and methods pertaining to a digital signal isolator device are described. In one embodiment, the device includes an isolation barrier and two metal support paddles. The isolation barrier contains an organic and/or a semi-organic insulating material with at least one capacitor embedded inside. One of the two metal support paddles is located below a first portion of a bottom surface of the isolation barrier to provide support to the isolation barrier, while the other metal support paddle is located below a second portion of a bottom surface of the isolation barrier to provide support to the isolation barrier.

Abstract: Systems and methods pertaining to propagation of digital data from a transmit side domain to a receive side domain through an intermediate isolation barrier are described. Specifically, a carrier waveform is superimposed upon a first logic level of a digital signal that is referenced to a first local ground. The digital signal with the superimposed first carrier waveform is propagated through the intermediate isolation barrier. On the receive side domain, the propagated digital signal is processed using a second local ground that is different than the first local ground, the processing including the use of the carrier waveform to enforce the first logic level upon an output digital signal generated from the propagated digital signal.

Abstract: A micro-machined switching system for equalizing an electrical property, such as charge due to parasitic capacitance formed at an input and an output of a micro-machined switching device. The micro-machined switching device may be a MEMS relay or a MEMS switch. In addition to the micro-machined switching device, the switching system also includes a balancing module for equalizing the electrical property between the input and the output of the micro-machined switching device. In certain embodiments, the balancing module includes a switch operable in a first state causing charge due to the parasitic capacitance on the input and the output of the micro-machined switching device to substantially balance. The switch is also operable in a second state wherein parasitic capacitance can separately accumulate at the input and the output of the micro-machined switching device.

Abstract: A micro-machined switching system for equalizing an electrical property, such as charge due to parasitic capacitance formed at an input and an output of a micro-machined switching device. The micro-machined switching device may be a MEMS relay or a MEMS switch. In addition to the micro-machined switching device, the switching system also includes a balancing module for equalizing the electrical property between the input and the output of the micro-machined switching device. In certain embodiments, the balancing module includes a switch operable in a first state causing charge due to the parasitic capacitance on the input and the output of the micro-machined switching device to substantially balance. The switch is also operable in a second state wherein parasitic capacitance can separately accumulate at the input and the output of the micro-machined switching device.

Abstract: A bipolar differential output circuit includes an input differential bipolar stage for receiving an input signal and generating a differential output current. An output differential pair of bipolar transistors without a bipolar tail current source responds to the input signal by providing a representative output signal. And a current mirror circuit passes current from the input differential pair to the output differential pair.

Abstract: A mobile communications handset (12) is capable of connection through two different networks (2, 27). When it is out of contact with its preferred local wireless access system (27), the handset will seek a hand-over to the cellular network (2), and will become registered as a “roaming” handset currently connected to the cellular network (2). The cellular network (2) reports this location information to the call server (28), as it would to the HLR of any normal visiting handset, so that incoming calls to the PSTN (6) destined for the user (12) can be routed by way of the cellular network. Outgoing calls are handled as conventional cellular telephony calls. When contact with a local wireless access system (27) is re-established, the contact information is passed to the call server 28, which reports to the cellular network (2) that a handover has occurred.

Abstract: A bipolar differential output circuit includes an input differential bipolar stage for receiving an input signal and generating a differential output current. An output differential pair of bipolar transistors without a bipolar tail current source responds to the input signal by providing a representative output signal. And a current mirror circuit passes current from the input differential pair to the output differential pair.

Abstract: A sub-ranging DAC converter is provided where voltage followers rather than operational amplifiers are used to avoid loading a main resistor string.

Abstract: A logic isolation circuit has a transmitter circuit for receiving a logic input signal and providing a periodic signal to an isolation barrier, and a receiving circuit for receiving the periodic signal from the isolation barrier and for providing an output signal that indicates the transitions in the logical input signal.

Abstract: A logic isolation circuit has a transmitter circuit for receiving a logic input signal and providing a periodic signal to an isolation barrier, and a receiving circuit for receiving the periodic signal from the isolation barrier and for providing an output signal that indicates the transitions in the logical input signal.

Abstract: A non-optical isolator having a driver circuit for providing an input signal to one or more first passive components which are coupled across a galvanic isolation barrier to one or more corresponding second passive components, and an output circuit that converts the signal from the second passive components to an output signal corresponding to the input signal. The entire structure may be formed monolithically as an integrated circuit on one or two die substrates, for low cost, small size, and low power consumption. The passive components may be coils or capacitor plates, for example. When the first and second passive components are capacitor plates, a Faraday shield may be provided between them, with the first and second passive components being referenced to separate grounds and the Faraday shield referenced to the same ground as the second passive components.

Abstract: A logic isolation circuit has a transmitter circuit for receiving a logic input signal and providing a periodic signal to an isolation barrier, and a receiving circuit for receiving the periodic signal from the isolation barrier and for providing an output signal that indicates the transitions in the logical input signal.

Abstract: A logic isolation circuit has a transmitter circuit for receiving a logic input signal and providing a periodic signal to an isolation barrier, and a receiving circuit for receiving the periodic signal from the isolation barrier and for providing an output signal that indicates the transitions in the logical input signal.

Abstract: Coil structures and isolators using them. A coil(s) is (are) used as a magnetic field-generating element(s) paired with another coil(s) or other magnetic field-receiving element(s). The coil(s) is(are) formed in or on a substrate which does not include some or all of the driver (i.e., input) or receiver (i.e., output) circuits. The coil(s) and magnetic field-receiving element(s) thus can be manufactured separately from the driver and/or receiver circuitry, using different processes, instead of subjecting the chip areas containing both input and output circuits to post processing to form the coil(s). Isolators can be assembled using such coils with a resultant lower cost. Isolators also can be assembled using transformers made from such coils wherein the transformers can be driven on either of their windings in order to provide bi-directional isolation with a single transformer.

Abstract: A logic isolation circuit has a transmitter circuit for receiving a logic input signal and providing a periodic signal to an isolation barrier, and a receiving circuit for receiving the periodic signal from the isolation barrier and for providing an output signal that indicates the transitions in the logical input signal.

Abstract: A non-optical isolator having a driver circuit for providing an input signal to one or more first passive components which are coupled across a galvanic isolation barrier to one or more corresponding second passive components, and an output circuit that converts the signal from the second passive components to an output signal corresponding to the input signal. The entire structure may be formed monolithically as an integrated circuit on one or two die substrates, for low cost, small size, and low power consumption. The passive components may be coils or capacitor plates, for example. When the first and second passive components are capacitor plates, a Faraday shield may be provided between them, with the first and second passive components being referenced to separate grounds and the Faraday shield referenced to the same ground as the second passive components.

Abstract: A logic isolation circuit has a transmitter circuit for receiving a logic input signal and providing a periodic signal to an isolation barrier, and a receiving circuit for receiving the periodic signal from the isolation barrier and for providing an output signal that indicates the transitions in the logical input signal.