Abstract: Disclosed is a power supply with a control circuit comprising a capacitively coupled bridge circuit (10) for using a low-voltage circuit to operate a high-voltage circuit. The invention maintains isolation between the high-and low voltage sections by using a capacitor (20).

Abstract: ESD input protection device uses a transistor (82) with the source terminal (100) connected to the input (12) from these source (18) to provide an alternate path for discharge. By having the input (12) imprint connected to the source (100) rather than the drain (102) and the substrate (104) and gate (103) terminals connected to a reference so that a decrease in the leakage current (Is) is realized as the source voltage (18) is increased over a range. The protection scheme is suitable for use with smaller device geometries such as 0.18 CMOS operating at 1½ to 2 volts.

Abstract: Disclosed is an implantable cardiac defibrillator (50) with a circuit comprising a capacitively coupled bridge circuit (10) for using a low-voltage circuit to operate a high-voltage circuit. The invention maintains isolation between the high- and low voltage sections by using a capacitor (20).

Abstract: Disclosed are apparatus and methods for generating an electronic signal responsive to selected wavelengths of the optical spectrum. An optical thickness differential between two or more photoconductors is used to generate an electronic signal calibrated to be representative of light signals of a selected range of wavelengths.

Abstract: Disclosed is a capacitively coupled bridge circuit for using a low-voltage circuit to operate a high-voltage circuit. The invention maintains isolation between the high- and low-voltage sections by using a capacitor. Also disclosed is the use of the invention in an inplantable cardiac defibrillator.

Abstract: Disclosed is a capacitively coupled bridge circuit for using a low-voltage circuit to operate a high-voltage circuit. The invention maintains isolation between the high-and low-voltage sections by using a capacitor. Also disclosed is the use of the invention in an inplantable cardiac defibrillator.

Abstract: Disclosed are apparatus and methods for generating an electronic signal responsive to selected wavelengths of the optical spectrum. An optical thickness differential between two or more photoconductors is used to generate an electronic signal calibrated to be representative of light signals of a selected range of wavelengths.

Abstract: ESD input protection device uses a transistor (82) with the source terminal (100) connected to the input (12) from these source (18) to provide an alternate path for discharge. By having the input (12) imprint connected to the source (100) rather than the drain (102) and the substrate (104) and gate (103) terminals connected to a reference so that a decrease in the leakage current (Is) is realized as the source voltage (18) is increased over a range. The protection scheme is suitable for use with smaller device geometries such as 0.18 CMOS operating at 1½ to 2 volts.

Abstract: An active quench circuit for an avalanche current device applies a bias voltage to reverse bias an avalanche current device above its avalanche breakdown voltage; a current amplifier circuit having a turn-off speed slower than the avalanche speed of the avalanche device and responsive to the avalanche current of the avalanche device generates an overshoot current continuing after the end of the avalanche current; and a feedback circuit responsive to the overshoot current generates a quenching voltage for reducing the bias voltage below the avalanche breakdown voltage to quench the avalanche current of the avalanche device.