Switching circuit meeting two-channel monitoring
By designing a switching circuit that satisfies two-channel monitoring, using the combination of operational amplifier and adjustable potentiometer to realize independent output of channels A and B signals, the problem that the headphone monitoring and amplifier output cannot be controlled separately when the two audio inputs are selected, and independent control and safe performance are achieved.
Patent Information
- Application Number
- CN202421362464.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-14
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2034-06-14
AI Technical Summary
When the existing audio equipment is selected for two audio inputs, the headphone monitoring and amplifier output cannot be controlled separately, resulting in the inability to predict the playback volume and progress of the next track selected to enter, which may damage the device or damage the ears and affect the performance.
A switching circuit that satisfies two-channel monitoring is designed. Through the combination of an operational amplifier and an adjustable potentiometer, the independent output of channels A and B signals is achieved, ensuring that the headphones and speakers output different signals respectively.
It realizes that when the audio selection input, the speaker and the headset output two different signals from the sound source, which can clearly understand the content and process of the next track, and can appropriately adjust the volume and tone to avoid equipment damage and performance abortion.
Smart Images
Figure CN222618987U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of audio, in particular to a switching circuit that satisfies two-channel monitoring. Background Art
[0002] Most of the speakers on the market use the same signal for headphone monitoring and amplifier output when two-way audio input is selected. If the monitoring and amplifier use the same signal when two-way audio input is selected, it is impossible to predict the volume and progress of the next track to be played, and it is also impossible to predict whether the song is correct, which brings a lot of uncertainty to the performance, such as: the volume is too loud and may damage the equipment, the volume is too loud and may damage the human ear, and the performance may be terminated. Summary of the invention
[0003] The technical problem to be solved by the utility model is to provide a switching circuit that satisfies two-channel monitoring, thereby solving the technical problems existing in the prior art.
[0004] In order to solve the above technical problems, the technical solution of the utility model is: a switching circuit that meets the two-channel monitoring, including an operational amplifier U1, an operational amplifier U2, an operational amplifier U3, an operational amplifier U4, a dual operational amplifier U5 and an adjustable potentiometer RV, the signal input end of channel A is connected to the inverting input end of the operational amplifier U1, the non-phase input end of the operational amplifier U1 is grounded, the output end of the operational amplifier U1 is respectively connected to the fixed contact A of the adjustable potentiometer, the inverting input end of the operational amplifier U2 and the non-phase input end of the operational amplifier U4, the output end of the operational amplifier U3 is connected to the signal output end of channel A, and the output end of the operational amplifier U3 is connected to the signal output end of channel A. The signal input terminal of channel B is connected to the inverting input terminal of the operational amplifier U3, the non-inverting input terminal of the operational amplifier U3 is grounded, the output terminal of the operational amplifier U3 is respectively connected to the fixed contact B of the adjustable potentiometer, the inverting input terminal of the operational amplifier U2 and the non-inverting input terminal of the operational amplifier U4, the output terminal of the operational amplifier U4 is connected to the inverting input terminal of the dual operational amplifier U5, the moving contact C of the adjustable potentiometer is respectively connected to the non-inverting input terminal of the operational amplifier U2 and the inverting input terminal of the dual operational amplifier U5, the non-inverting input terminal of the dual operational amplifier U5 is grounded, and the output terminal of the dual operational amplifier U5 is connected to the signal output terminal of channel B. The principle of the utility model is as follows: when point C of the adjustable potentiometer RV is adjusted to point A, the operational amplifier U2 performs differential amplification, the input signal at point A is offset, the earphone outputs signal B, the dual operational amplifier U5 directly amplifies the signal at point A, and the speaker outputs signal A; when point C of the adjustable potentiometer RV is adjusted to point B, the operational amplifier U2 performs differential amplification, the input signal at point B is offset, the earphone outputs signal A, the dual operational amplifier U5 directly amplifies the signal at point B, and the speaker outputs signal B.
[0005] Compared with the prior art, the utility model has the following beneficial effects:
[0006] When the adjustable potentiometer RV is switched, channel A / B is output to the earphone and the speaker respectively, that is, when the earphone outputs A signal, the speaker outputs B signal; when the earphone outputs B signal, the speaker outputs A signal. BRIEF DESCRIPTION OF THE DRAWINGS
[0007] Figure 1 This is the circuit diagram of the utility model. DETAILED DESCRIPTION
[0008] The utility model will be further described below in conjunction with the accompanying drawings.
[0009] like Figure 1 As shown, a switching circuit that satisfies two-channel monitoring includes an operational amplifier U1, an operational amplifier U2, an operational amplifier U3, an operational amplifier U4, a dual operational amplifier U5 and an adjustable potentiometer RV. The signal input end of channel A is connected to the inverting input end of the operational amplifier U1, the non-inverting input end of the operational amplifier U1 is grounded, the output end of the operational amplifier U1 is respectively connected to the fixed contact A of the adjustable potentiometer, the inverting input end of the operational amplifier U2 and the non-inverting input end of the operational amplifier U4, the output end of the operational amplifier U3 is connected to the signal output end of channel A, and the signal input end of channel B is connected to the operational amplifier U4. The inverting input terminal of the operational amplifier U3 is connected, the non-inverting input terminal of the operational amplifier U3 is grounded, the output terminal of the operational amplifier U3 is respectively connected to the fixed contact B of the adjustable potentiometer, the inverting input terminal of the operational amplifier U2 and the non-inverting input terminal of the operational amplifier U4, the output terminal of the operational amplifier U4 is connected to the inverting input terminal of the dual operational amplifier U5, the moving contact C of the adjustable potentiometer is respectively connected to the non-inverting input terminal of the operational amplifier U2 and the inverting input terminal of the dual operational amplifier U5, the non-inverting input terminal of the dual operational amplifier U5 is grounded, and the output terminal of the dual operational amplifier U5 is connected to the signal output terminal of channel B. Principle of the utility model: when point C of the adjustable potentiometer RV is adjusted to point A, the operational amplifier U2 performs differential amplification, the input signal at point A is offset, the headphone outputs signal B, the dual operational amplifier U5 directly amplifies the signal at point A, and the speaker outputs signal A; when point C of the adjustable potentiometer RV is adjusted to point B, the operational amplifier U2 performs differential amplification, the input signal at point B is offset, the headphone outputs signal A, the dual operational amplifier U5 directly amplifies the signal at point B, and the speaker outputs signal B; when audio selection input is performed, the speaker and the headphone respectively output two different audio source signals, so that the content and progress of the next track can be clearly understood, and the volume and timbre of the next track can be appropriately adjusted.
Claims
1. A switching circuit that satisfies two-channel monitoring, characterized in that: The invention comprises an operational amplifier U1, an operational amplifier U2, an operational amplifier U3, an operational amplifier U4, a dual operational amplifier U5 and an adjustable potentiometer RV, the signal input end of channel A is connected to the inverting input end of the operational amplifier U1, the non-inverting input end of the operational amplifier U1 is grounded, the output end of the operational amplifier U1 is respectively connected to the fixed contact A of the adjustable potentiometer, the inverting input end of the operational amplifier U2 and the non-inverting input end of the operational amplifier U4, the output end of the operational amplifier U3 is connected to the signal output end of channel A, the signal input end of channel B is connected to the inverting input end of the operational amplifier U3 The input terminals are connected, the positive phase input terminal of the operational amplifier U3 is grounded, the output terminal of the operational amplifier U3 is respectively connected to the fixed contact B of the adjustable potentiometer, the inverting input terminal of the operational amplifier U2 and the positive phase input terminal of the operational amplifier U4, the output terminal of the operational amplifier U4 is connected to the inverting input terminal of the dual operational amplifier U5, the moving contact C of the adjustable potentiometer is respectively connected to the positive phase input terminal of the operational amplifier U2 and the inverting input terminal of the dual operational amplifier U5, the positive phase input terminal of the dual operational amplifier U5 is grounded, and the output terminal of the dual operational amplifier U5 is connected to the signal output terminal of channel B.