CN201365230Y - Negative feedback audio-frequency harmonic exciting circuit - Google Patents

Abstract

The utility model discloses a negative feedback audio-frequency harmonic exciting circuit, comprising a current type tone circuit and a V/I (voltage/current) switching circuit which are combined with and output audio-frequency current signals with adjustable tone; the negative feedback audio-frequency harmonic exciting circuit also comprises a parallel network of an L network, a C network and an R network, and an output circuit; the parallel network of the L network, the C network and the R network is used for leading the audio-frequency current signals to combine signals which generate harmonic wave and pass through the R network by the L network and the C network and then flow into the output circuit; and audio-frequency signals with exciting components are formed on the output circuit and then can be output to a power amplifier and a loudspeaker to give out sound with harmonic excitation. The negative feedback audio-frequency harmonic exciting circuit integrates tone adjustment and audio-frequency exciter, and as the tone adjustment can influence audio-frequency harmonic exciting effect, the harmonic exciting circuit can generate diverse effects due to tone adjustment, and is more easier to meet personalized selection, and can be widely applied to various audio-frequency signals and processing (non-power amplification), and a user can personally adjust different effects with audio-frequency harmonic excitation.

Description

A kind of negative feedback audio frequency harmonic excitation circuit

Technical field

The utility model relates to the sound equipment field, relates in particular to a kind of negative feedback audio frequency harmonic excitation circuit.

Background technology

Present civilian audio area much has the circuit of tone regulatory function, but does not all relate to audio excitation.

The utility model content

Problem to be solved in the utility model provides integrating that a kind of circuit is simple, cost is low, and tone is regulated and the negative feedback audio frequency harmonic excitation circuit of audio exciter.

The technical scheme that the utility model adopted is: negative feedback audio frequency harmonic excitation circuit comprises:

Current mode tone circuit and V/I (voltage/current) change-over circuit, the current mode tone circuit combines with the V/I change-over circuit, the adjustable tone currents signal of output tone;

L, C, R parallel network are used to make the tone currents signal will produce harmonic wave and merge inflow output circuit in back by the signal behind the R by L, C network;

Output circuit is exported after the output circuit upper end is formed with the audio signal that encourages composition, promptly is output to power amplifier and loud speaker and sends the sound that has harmonic excitation.

In the such scheme, described voltage adopts triode, field effect transistor or discharge circuit.

The beneficial effects of the utility model are: the utility model integrates tone to be regulated and audio exciter, because regulating, tone will have influence on audio frequency harmonic excitation effect, will be owing to tone is regulated the various effect of generation, easilier meet personalized the selection, can be widely used in various audio signals and processing (non-power amplification), adjust the different-effect of band audio frequency harmonic excitation user's personalizable.

Description of drawings

The utility model is described in further detail below in conjunction with the drawings and specific embodiments:

Fig. 1 is a schematic block circuit diagram of the present utility model.

Embodiment

As shown in Figure 1, negative feedback audio frequency harmonic excitation circuit comprises:

Current mode tone circuit and V/I (voltage/current) change-over circuit, the current mode tone circuit combines with the V/I change-over circuit, the adjustable tone currents signal of output tone;

L, C, R parallel network are used to make the tone currents signal will produce harmonic wave and merge inflow output circuit in back by the signal behind the R by L, C network;

Output circuit is exported after the output circuit upper end is formed with the audio signal that encourages composition, promptly is output to power amplifier and loud speaker and sends the sound that has harmonic excitation.

When audio frequency can be regulated its high low pitch during by this circuit, and generation improves the harmonic wave of tone color, when regulating tone, different-effect will produce various audio excitation effect, last this kind audio signal is sent more interesting to listen to sound by power amplifier and loud speaker, adapt to single supply, the multiple supply power mode of duplicate supply, circuit can be applied in a flexible way in multiple Audio Processing.

Claims (2)

1, a kind of negative feedback audio frequency harmonic excitation circuit is characterized in that: described negative feedback audio frequency harmonic excitation circuit comprises:

Current mode tone circuit and V/I change-over circuit, the current mode tone circuit combines with the V/I change-over circuit, the adjustable tone currents signal of output tone;

L, C, R parallel network are used to make the tone currents signal will produce harmonic wave and merge inflow output circuit in back by the signal behind the R by L, C network;

Output circuit is exported after the output circuit upper end is formed with the audio signal that encourages composition.

2, negative feedback audio frequency harmonic excitation circuit according to claim 1 is characterized in that: described voltage adopts triode, field effect transistor or discharge circuit.

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