Combined power and timing signals for equipment

Abstract

The invention relates to combined power and timing signals for equipment, in particular relates to combined power and timing signals in single electronic equipment. In one embodiment mode, a circuit can only comprise an isolation transformer, and the isolation transformer can be operated for generating a power signal and a timing signal. In a secondary side, two branches can be used for extracting the power signal and a clock signal which are used in a circuit on the isolated secondary side. The first branch can be coupled to the transformer, and can be operated for controlling a signal, such as a 5V direct-current signal, into the power signal. Similarly, the second circuit branch can be operated for controlling a signal, such as a 5V signal with 1MHz frequency, into the clock signal. Through extracting the power signal and the clock signal from the same isolation transformer at the secondary side, valuable space on integrated circuit equipment is saved due to a single winding used for the single isolation transformer.

Description

technical field [0001] The present invention relates to circuits and methods for generating power and timing signals, and three-phase metering systems. Background technique [0002] Systems and devices often rely on two types of signals to operate. Power signals can be used to provide power, logic, and control signals within a system or device. In addition, timing or clock signals may also be used to trigger, manipulate, or otherwise control various components and circuits of a system or device. Therefore, the two signals can be used together accordingly. [0003] Many times, a system or device may have the above-mentioned signals provided from outside the system or device. That is, the power signal and / or clock signal may come from a circuit external to the system or device. For example, when monitoring overhead power lines, the equipment used for monitoring may draw power directly from the power line itself. Similarly, in a device with multiple integrated circuit (IC)...

AI Technical Summary

Problems solved by technology

Providing two isolation transformers for these two sets of signals is bulky and inefficient

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