Abstract: Aspects of the present disclosure include a scalable proportional to absolute temperature (PTAT) hybrid circuit, comprising a bias mirror circuit configured to provide a zero temperature coefficient (ZTC) current, a PTAT control circuit configured to generate, based on the ZTC current, a PTAT current with a slope having a non-zero value, alter the PTAT current by at least scaling the PTAT current or changing the slope of the PTAT current to generate an altered PTAT current, and provide the altered PTAT current, a hybrid circuit configured to receive the ZTC current and the altered PTAT current, and output a larger current of the ZTC current and the altered PTAT current as a hybrid current.

Abstract: Aspects of the present disclosure include a hybrid circuit, including a first current sink configured to sink a zero temperature coefficient (ZTC) current, a second current sink configured to sink a positive temperature coefficient (PTC) current, a first transistor configured to provide a first current, a second transistor configured to provide a second current, a third transistor configured to provide a third current mirroring the ZTC current, a fourth transistor configured to provide a sum current of the first current and the third current, and a current mirror configured provide a hybrid current mirroring the sum current.

Abstract: A fully symmetrical and balanced monolithic or multi-die integrated circuit transformer device is described. The device can comprise a first and second transformer. The first and second transformer can each comprise a symmetrical bottom coil including electrically conductive crossovers between individual windings of pairs of adjacent windings. Each of the bottom coils can further comprise a first, a second differential terminal, and a center tap third terminal electrically connected to the inner-most winding of the bottom coil. Each transformer can further comprise a spiral top coil electrically connected to an encompassed inner pad and a laterally offset outer pad, the top coil, inner pad, and outer pad including a shared electrically conductive integrated circuit layer. The respective top coils of each transformer can be overlaid and separated from the respective bottom coils by an electrically insulating dielectric layer.

Abstract: Aspects of the present disclosure include a hybrid circuit, including a first current sink configured to sink a zero temperature coefficient (ZTC) current, a second current sink configured to sink a positive temperature coefficient (PTC) current, a first transistor configured to provide a first current, a second transistor configured to provide a second current, a third transistor configured to provide a third current mirroring the ZTC current, a fourth transistor configured to provide a sum current of the first current and the third current, and a current mirror configured provide a hybrid current mirroring the sum current.

Abstract: Isolators for signals and/or powers transmitted between two circuits configured to operate at different voltage domains are provided. The isolators may have working voltages, for example, higher than 500 Vrms, higher than 1000 Vrms, or between 333 Vrms and 1800 Vrms. The isolators may have a fully symmetrical configuration. The isolators may include a primary winding coupled to a driver and a secondary winding coupled to a receiver. The primary and secondary windings may be laterally coupled to and galvanically isolated from each other. The primary and secondary windings may include concentric traces. The primary and secondary windings may be fabricated using a single metallization layer on a substrate.

Abstract: Isolators for signals and/or powers transmitted between two circuits configured to operate at different voltage domains are provided. The isolators may have working voltages, for example, higher than 500 Vrms, higher than 1000 Vrms, or between 333 Vrms and 1800 Vrms. The isolators may have a fully symmetrical configuration. The isolators may include a primary winding coupled to a driver and a secondary winding coupled to a receiver. The primary and secondary windings may be laterally coupled to and galvanically isolated from each other. The primary and secondary windings may include concentric traces. The primary and secondary windings may be fabricated using a single metallization layer on a substrate.

Abstract: A receiver system for an on-off key (“OOK”) isolator system may include a pair of receivers. A first receiver may generate a first current signal representing a received OOK signal, and a second receiver may generate a second current signal from a common mode representation of the received OOK signal. The receiver system may include circuitry to compare the first and second current signals and generate an output signal therefrom.

Abstract: A receiver system for an on-off key (“OOK”) isolator system may include a receiver that generates an intermediate current signal based on an OOK input signal. The intermediate current may be provided at a first current level when the input signal has a first OOK state and a second current level when the input signal has a second OOK state. The system also may include an output driver to generate a voltage representation of the intermediate current signal. Performing signal processing in a current domain permits fast transitions between OOK states.

Abstract: An isolator system has an isolator that generates differential isolator signals and a receiver that generates digital data representative of signals received from the isolator. The system also may include an RC filter coupled between the isolator and the receiver. During operation, the filter may distribute transient signals across various circuit paths in the isolator, only some of which are coupled to the receiver inputs. Over time, the filter may attenuate transient contributions at the receiver inputs. In this manner, the filter may limit effects of these common mode transients.

Abstract: An oscillator for a signal isolator system includes a capacitor and an inductor connected in parallel, two pairs of cross-coupled switches and a control switch. The capacitor, the inductor and the cross-coupled switches form an oscillator. The control switch controls operation of the oscillator between an ON state and an OFF state in response to a data signal to be communicated across an isolation barrier. The inductor may be formed from a winding of an isolation transformer, which reduces component count as compared to a system that provides a separate inductor. Other embodiments may include a current-supplying kickstart circuit and a shorting transistor that can speed transition between the ON and OFF states.

Abstract: An isolator system has an isolator that generates differential isolator signals and a receiver that generates digital data representative of signals received from the isolator. The system also may include an RC filter coupled between the isolator and the receiver. During operation, the filter may distribute transient signals across various circuit paths in the isolator, only some of which are coupled to the receiver inputs. Over time, the filter may attenuate transient contributions at the receiver inputs. In this manner, the filter may limit effects of these common mode transients.

Abstract: A receiver system for an on-off key (“OOK”) isolator system may include a pair of receivers. A first receiver may generate a first current signal representing a received OOK signal, and a second receiver may generate a second current signal from a common mode representation of the received OOK signal. The receiver system may include circuitry to compare the first and second current signals and generate an output signal therefrom.

Abstract: A receiver system for an on-off key (“OOK”) isolator system may include a receiver that generates an intermediate current signal based on an OOK input signal. The intermediate current may be provided at a first current level when the input signal has a first OOK state and a second current level when the input signal has a second OOK state. The system also may include an output driver to generate a voltage representation of the intermediate current signal. Performing signal processing in a current domain permits fast transitions between OOK states.

Abstract: An oscillator for a signal isolator system includes a capacitor and an inductor connected in parallel, two pairs of cross-coupled switches and a control switch. The capacitor, the inductor and the cross-coupled switches form an oscillator. The control switch controls operation of the oscillator between an ON state and an OFF state in response to a data signal to be communicated across an isolation barrier. The inductor may be formed from a winding of an isolation transformer, which reduces component count as compared to a system that provides a separate inductor. Other embodiments may include a current-supplying kickstart circuit and a shorting transistor that can speed transition between the ON and OFF states.