JPH0314699U

JPH0314699U -

Info

Publication number: JPH0314699U
Application number: JP2898489U
Authority: JP
Priority date: 1989-03-06
Filing date: 1989-03-13
Publication date: 1991-02-14

Description

[Brief explanation of drawings]

第１図は実施例の共振装置をエレキギターに取
り付けた状態を示す斜視図、第２図は実施例の原
理図、第３図は第１図の要部断面図、第４図は実
施例の電気回路のブロツク図、第５図は圧電発音
体ドライブ回路図、第６図は圧電発音体の入力電
気信号と音圧との関係を示す図、第７図は真理値
表、第８図はプログラム図、第９図ａ〜ｃはプラ
イオリテイエンコーダの回路図である。１……楽器本体、２……弦、３……磁石、４…
…ピツクアツプコイル、５……ピツクアツプ、６
……圧電発音体、８……増幅器、１５……圧電発
音体ドライブ回路、２５……インピーダンス変換
回路、２６……プライオリテイエンコーダＩＣ、
２７……Ｄ／Ａ変換回路。 Fig. 1 is a perspective view showing the resonator of the embodiment attached to an electric guitar, Fig. 2 is a principle diagram of the embodiment, Fig. 3 is a sectional view of the main part of Fig. 1, and Fig. 4 is the embodiment. Fig. 5 is a piezoelectric sounding element drive circuit diagram, Fig. 6 is a diagram showing the relationship between the input electric signal of the piezoelectric sounding element and sound pressure, Fig. 7 is a truth table, and Fig. 8 9 is a program diagram, and FIGS. 9a to 9c are circuit diagrams of the priority encoder. 1... Instrument body, 2... Strings, 3... Magnet, 4...
...Pickup coil, 5...Pickup, 6
...Piezoelectric sounding element, 8...Amplifier, 15...Piezoelectric sounding element drive circuit, 25...Impedance conversion circuit, 26...Priority encoder IC,
27...D/A conversion circuit.

Claims

[Claims for Utility Model Registration] (1) A resonance device for a stringed instrument, characterized in that a pickup and a speaker are provided on the main body of the stringed instrument, facing the strings, and the speaker is connected to the pickup via an amplifier. (2) The resonance device for a stringed instrument according to claim (1), wherein the speaker is made of a piezoelectric sounding body. (3) Impedance conversion, in which a D/A conversion circuit is connected to the output terminals of a special priority encoder IC with the required resistances connected between the input terminals, and a piezoelectric sounding element is connected to the D/A conversion circuit. It consists of a configuration in which circuits are connected, and the internal program of the above-mentioned IC converts the analog component of the analog input signal into a digital output signal that has been subjected to certain processing such as converting the analog component to a digital component whose size is increased or decreased as required. D/A digital output signal
A conversion circuit converts it into a stepped analog signal,
A piezoelectric sounding element drive circuit that inputs this analog signal to the piezoelectric sounding element via an impedance conversion circuit.