Synopsys, Inc.

Siemens Schweiz Ag

Hong Xiang Liang

Xue Song Shen

Jian Tan

Naiyong Jin

The present disclosure generally relates to the field of fire alarms. The teachings thereof may be embodied in a strobe notification appliance having: a boost circuit connected to an input voltage; an energy storage circuit charged by the boost circuit; a drive circuit generating a drive current; an LED circuit with at least one LED element; a first sampling circuit collecting an overall voltage drop of all the LED elements; and a control circuit configured to adjust the drive circuit to supply a working current during an alarming stage and supply a detection current during a detection stage. The detection current is lower than the working current and thereby light energy produced by the LED elements during the detection stage is lower than alarming light energy produced during the alarming stage. During the detection stage, the control circuit determines whether the LED circuit works normally based on the collected overall voltage drop.

Fire alarm systems

A method and apparatus for structure analysis of a circuit design are described. In one exemplary embodiment, a functional specification of a circuit design is received, where the functional specification is defined based on a behavior layer abstraction. In addition, design codes for the circuit design are received, wherein in each design code of the design codes is defined based on the behavior layer abstraction. Furthermore, the design codes are searched, which is performed in the behavior layer abstraction, for one or more of the design codes that satisfy the functional specification. Each of the design codes that satisfy the functional specification is therefore recognized.

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Beijing, China

Hong Xiang Liang