Abstract: A method and structure for wave-shaping of digital waveforms of integrated circuit processes that do not have area efficient dielectric capacitors is disclosed. The dielectric capacitors of the prior art are replaced with a first, linearizing diode and a second diode of a wave-shaping circuit, each diode having a junction capacitance that varies with voltage applied across the diode. The first, linearizing diode is supplied with a constant current from a constant current source. A current inversely proportional to the junction capacitance of the first, linearizing diode is produced at a node defined as the connection between the constant current source and the first linearizing diode. The current at the node is supplied to the second diode to produce an output voltage of the wave-shaping circuit that is linear with respect to time.

Abstract: An electrical power protection integrated circuit provides protection against reverse battery and overvoltage conditions that is particularly of value in automotive applications in which reverse battery and overvoltage conditions are commonplace. The electrical power protection integrated circuit device contains a reverse battery condition protection element, supplied either directly or indirectly from a battery power source, that protects against a reverse battery condition of the battery power source and an overvoltage protection element coupled to the reverse battery condition protection device that protects against an overvoltage condition of the battery power source and produces a protected power output that is isolated from both battery overvoltage and reverse battery voltage conditions. Additionally, the integrated circuit device can further produce an auxiliary protected power output that is isolated from reverse battery voltage conditions.

Abstract: A circuit for controlling two power transistors (24, 26) used an synchronous rectifiers in the secondary side of a switched mode power supply is provided. Current detector circuits (40, 42) measure current through parasitic diodes (28, 30) of the power transistors. It is shown that the synchronisation achieved is more accurate, and the resultant device is simpler and cheaper than previous solutions.