JPH032723U - - Google Patents

Description

[Brief explanation of drawings]

Fig. 1 is an electrical circuit diagram of one embodiment of the present invention;
FIG. 3 is a frequency characteristic diagram at normal times, FIG. 3 is a frequency characteristic diagram at high output, and FIG. 4 is an electrical circuit diagram of a conventional range control circuit. I...Signal input terminal, C1, C3...Capacitor (enhancement element), C2...Capacitor (reduction element), VR1...Low frequency adjustment volume (adjustment element), Q...P channel electric field effect Transistor (switching element), Z...Zena diode (level detection element).

Claims (1)

[Scope of utility model registration request] In a sound range control device that adjusts to increase or decrease the output level of a specific sound range such as a bass range or a treble range of an acoustic signal, an element for enhancing a specific sound range and an element for reducing a sound range are connected in parallel to a signal input terminal. Each element is provided with an adjustment element that varies the ratio of currents flowing through each element, a switching element is connected in series to the boosting element, and a level detection element is provided to detect when the output level exceeds a predetermined level. 1. A sound range control circuit for an audio device, characterized in that the switching element is turned off by a predetermined level detection signal from a level detection element.