Abstract: A Light Emitting Diode (LED) driving circuit includes a reference-voltage terminal, an input terminal to receive a pulse-width modulated (PWM) power signal, and a PWM output terminal. An LED is coupled across the PWM output terminal and the reference-voltage terminal. A measurement capacitor circuit and a voltage-divider network are coupled in parallel with the LED. During an interruption of the PWM power signal, a sense node of the voltage-divider provides a voltage indicative of a temperature of the LED prior to the interruption. The voltage indicative of the temperature is used to control driving of the LED.

Abstract: An embodiment of the invention is concerned with a circuit and a method for the generation and operation of the plasmas in High Pressure Short Arc Lamps having miniature dimensions using alternating current. In the method, by means of the selection values of particular operating parameters of a half-bridge amplifying circuit and by means of additionally few circuit components, a lamp voltage characteristic is achieved that prevents the extinguishing of the arc under typical operating conditions.

Abstract: An embodiment of the invention is concerned with a circuit and a method for the generation and operation of the plasmas in High Pressure Short Arc Lamps having miniature dimensions using alternating current. In the method, by means of the selection values of particular operating parameters of a half-bridge amplifying circuit and by means of additionally few circuit components, a lamp voltage characteristic is achieved that prevents the extinguishing of the arc under typical operating conditions.