Low-power consumption power carrier communication circuit and method

Abstract

The invention provides a low-power consumption power carrier communication circuit and a low-power consumption power carrier communication method. The circuit comprises an on-chip part which is integrated on the same chip; and the on-chip part is used for performing processing such as frequency mixing, band-pass filtering and modulation on an externally coupled carrier signal so as to acquire communication information carried by the carrier signal. The on-chip part can comprise a frequency mixer, an active band-pass filter, a modulator and the like; in addition, an input signal strength indicating circuit and a sleep-mode control unit can also be configured on the chip for controlling the working mode of a high-power consumption device (such as a modulator and the like) on the chip, so that the power consumption can be effectively reduced; and by adopting the active band-pass filter, an off-chip ceramic filter can be saved, the cost can be effectively reduced and the flexibility of design is improved.

Description

technical field [0001] The invention relates to a power carrier communication circuit, in particular to a low power consumption power carrier communication circuit and method. Background technique [0002] The carrier frequency distribution range used by power line carrier communication is: Europe (CENELEC): 3-148.5KHz, North America (FCC): 100-450kHz. In this communication mode, the signal attenuation is large and the noise interference is strong. For such complex communication conditions, the usual power line carrier receiving circuit is a circuit with a heterodyne structure. [0003] like Figure 1A and Figure 1B As shown, this is the receiver front-end circuit architecture of a company that is more influential in the field of power line carrier. Among them, Figure 1A is a schematic diagram of the functional modules of the front-end circuit of the receiver, Figure 1B The specific circuit diagram of the front-end circuit of the receiver. like Figure 1A As shown, the...

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Problems solved by technology

In addition, the insertion loss of the ceramic filter is usually more than 6dB, so the signal-to-noise ratio of the receiver will be lost by 6dB, which reduces the system sensitivity.

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