Carrier circuit and directional sound production equipment

Abstract

The embodiment of the invention discloses a carrier circuit. The carrier circuit comprises an inverter, a filter circuit, a charging and discharging circuit and a power supply, wherein a power supplyend of the inverter is connected with the power supply; an enabling end of the inverter and a ground end of the inverter are respectively grounded; the inverter is used for receiving an input signal via an input end of the inverter, performing inversion treatment on the phase of the input signal, and acquiring a carrier signal via an output end of the inverter; one end of the filter circuit is connected with the power supply end, while the other end of the filter circuit is grounded; the filter circuit is used for filtering the power supply; a first end of the charging and discharging circuitis connected with the output end, a second end of the charging and discharging circuit is connected with the input end, and a third end of the charging and discharging circuit is grounded; and the charging and discharging circuit is used for charging or discharging according to the carrier signal to update the input signal of the input end. The embodiment of the invention also simultaneously provides directional sound production equipment.

Description

technical field [0001] The present application relates to the technology of carrier circuits, in particular to a carrier circuit and directional sound emitting equipment. Background technique [0002] At present, with the increase of user audition scenarios and the protection of information privacy, the emergence of directional generating equipment has gradually become the choice of consumers. The current mainstream directional generating equipment is mainly used in exhibition halls, shopping guide desks and other scenarios. This device It consists of an audio processing module, a power module and an ultrasonic sounding module, among which the most critical part of the audio processing module is the carrier circuit. [0003] Generally, the carrier circuit uses a micro control unit (MCU, Microcontroller Unit) + crystal oscillator to output the carrier signal of the required frequency. However, the MCU is used to generate the carrier signal, the signal quality is poor, the sta...

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Problems solved by technology

[0003] Generally, the carrier circuit uses a micro control unit (MCU, Microcontroller Unit) + crystal oscillator to output the carrier signal of the required frequency. However, the MCU is used to generate the carrier signal, the signal quality is poor, the stability is poor, and it is easy to be interfered and cause signal jitter, and , the MCU needs an external crystal oscillator, which increases the hardware cost; it can be seen from this that the quality of the carrier signal generated by the existing carrier circuit is poor

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