JPS6210599U

JPS6210599U -

Info

Publication number: JPS6210599U
Application number: JP10058085U
Authority: JP
Priority date: 1985-07-02
Filing date: 1985-07-02
Publication date: 1987-01-22

Description

[Brief explanation of the drawing]

第１図は本考案の音場再生装置の構成を示す図
、第２図乃至第５図は同、他の実施例の構成を示
す図、第６図は従来の音場再生装置の構成を示す
図である。１Ｌ，１Ｒ……第１、第２の差動型電力増幅器
の入力端子、２Ｌ，２Ｒ……第１、第２の差動型
電力増幅器、３Ｌ，３Ｒ……第１、第２のスピー
カー、６ａ，７ａ……第１、第２の差動型電力増
幅器の反転入力端子、６ｂ，７ｂ……第１、第２
の差動型電力増幅器の非反転入力端子、８Ｌ，８
Ｒ……第１、第２の差動型電力増幅器の出力端子
、９Ｌ，９Ｒ，１０Ｌ，１０Ｒ……第１、第２、
第３、第４の抵抗、１１……インピーダンス回路
、１２……抵抗、１３……スイツチ付可変抵抗器
、１４……コンデンサ。 FIG. 1 is a diagram showing the configuration of the sound field reproducing device of the present invention, FIGS. 2 to 5 are diagrams showing the configuration of other embodiments of the same, and FIG. 6 is a diagram showing the configuration of the conventional sound field reproducing device. FIG. 1L, 1R...input terminals of the first and second differential power amplifiers, 2L, 2R...the first and second differential power amplifiers, 3L, 3R...the first and second speakers, 6a, 7a...inverting input terminals of the first and second differential power amplifiers, 6b, 7b...the first and second
Non-inverting input terminal of differential power amplifier, 8L, 8
R...output terminals of the first and second differential power amplifiers, 9L, 9R, 10L, 10R...first, second,
Third and fourth resistors, 11... impedance circuit, 12... resistor, 13... variable resistor with switch, 14... capacitor.

Claims

[Claims for Utility Model Registration] 1. Inverting input terminals 6a, 7a, non-inverting input terminal 6
the first and second differential power amplifiers 2L and 2R, each of which has a non-inverting input terminal 6b,
first and second input terminals 1L and 1R connected to 7b and into which left and right channel signals are input, respectively, and the first and second differential power amplifiers 2L and 2R.
The first terminal connected to the output terminals 8L and 8R of
, second speakers 3L, 3R, and output terminals 8L, 8R of the first and second differential power amplifiers 2L, 2R are connected to inverting input terminals via first and second resistors 9L, 9R. 6a and 7a, respectively, and the inverting input terminals 6a and 7a are connected to the third
, the first and second differential power amplifiers 2L, 2 are grounded via fourth resistors 10L, 10R, respectively.
A sound field reproducing device characterized in that R inverting input terminals 6a and 7a are connected via an impedance circuit 11. 2. The sound field reproducing device according to claim 1, wherein the impedance circuit 11 is composed of a resistor 12. 3. The sound field reproducing device according to claim 1, wherein the impedance circuit 11 is constituted by a series circuit of a resistor 12 and a variable resistor 13 with a switch. 4. The sound field reproduction device according to claim 1, wherein the impedance circuit 11 is composed of a series circuit of a resistor 12 and a capacitor 14.