JPS5895412A - Integrated circuit device - Google Patents

Integrated circuit device

Info

Publication number
JPS5895412A
JPS5895412A JP56194151A JP19415181A JPS5895412A JP S5895412 A JPS5895412 A JP S5895412A JP 56194151 A JP56194151 A JP 56194151A JP 19415181 A JP19415181 A JP 19415181A JP S5895412 A JPS5895412 A JP S5895412A
Authority
JP
Japan
Prior art keywords
circuit
amplifier
negative feedback
input terminal
terminal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP56194151A
Other languages
Japanese (ja)
Inventor
Koichi Fukaya
深谷 弘一
Haruo Niki
仁木 春生
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
NEC IC Microcomputer Systems Co Ltd
Original Assignee
NEC Corp
Nippon Electric Co Ltd
NEC IC Microcomputer Systems Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Corp, Nippon Electric Co Ltd, NEC IC Microcomputer Systems Co Ltd filed Critical NEC Corp
Priority to JP56194151A priority Critical patent/JPS5895412A/en
Priority to US06/446,131 priority patent/US4494077A/en
Publication of JPS5895412A publication Critical patent/JPS5895412A/en
Priority to US06/639,296 priority patent/US4596957A/en
Pending legal-status Critical Current

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  • Amplifiers (AREA)

Abstract

PURPOSE:To switch the function to two functions of a dual amplifier and a BTL amplifier, by incorporating a switching circuit. CONSTITUTION:Switches SWa-SWc are external interlocking switches. When the switch SWa is set as shown in figure, internal switches SW1-SW3 are set as shown in figure by a switching circuit 400, and two amplifiers are independent of each other to function as a dual amplifier. When external switches are connected to the other contacts, outputs of two amplifiers are connected to both ends of a load RL3, and the switching circuit 400 detects that the input terminal is grounded, and the circuit 400 closes internal switches SW2 and SW3 and opens the switch SW1 to mix input signals VS1 and VS2, and the mixed signal is amplified by an amplifier 200 and is not only outputted to one end of the load but also inputted to the inverted input of an amplifier 300, and the output having a polarity opposite to that of the output of the amplifier 200 is outputted from the amplifier 300 to the other end of the load RL3, and thus, two amplifiers function as a BTL amplifier.

Description

【発明の詳細な説明】 本発明は、電力壇幅器を集積化した果槓回路装置に関す
るものである。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a power converter circuit device in which a power converter is integrated.

集積回路化された篭力壇幅器には、大別すると増幅器を
1つ有する1チヤンネルのものと独立した増幅器を2つ
有する2チヤンネルのものがあるが、本発明は後者に関
するものである。
Integrated circuit power converters can be roughly divided into one-channel type having one amplifier and two-channel type having two independent amplifiers, and the present invention relates to the latter.

2チヤンネルの集積回路の使用方法としては、プーアル
アンプとBTLアンプの2通りがあり、2つの負帰還冷
−器200,300をもつ集槓回路100を用いたそれ
ぞれの回路例を第1図及び第2図に示す。第1図の実施
例では二つの入力信号源vs、 e vStに対してそ
れぞれ帰還抵抗1(、、、九をもつ二つの負帰還電力増
幅回路200,300が独立に増−機能を持ち各負荷ル
Lle凡り、にコンテンツC3,C4を介して出力を与
えるものである。尚、抵。
There are two ways to use a two-channel integrated circuit: a Puer amplifier and a BTL amplifier. Examples of each circuit using an integrated circuit 100 having two negative feedback coolers 200 and 300 are shown in FIGS. Shown in Figure 2. In the embodiment shown in FIG. 1, two negative feedback power amplifier circuits 200 and 300 each having a feedback resistance of 1 (..., 9) for two input signal sources vs, e vSt have an independent amplification function and each load This is to give an output to each element via contents C3 and C4.

抗R,,R,、コンデンサC1,C,は負帰還用のもの
である。一方、高出力電力を得たい時は、第2図の回路
例の様に負帰還増幅回路200に入力信号Vs、を与え
、その出力を負荷RIL、の一方の端子に与えるととも
に、抵抗鳥を介して負帰還増幅回路300の反転入力端
子に入力し、この負帰還増幅回路300の出力゛を負荷
)Lx、sの他方の端子に与えるようにBTL接続とし
て使用する。この時負帰還増幅回路300の非反転入力
端はコンデンサC1で接地しておく。
The resistors R,,R, and capacitors C1 and C are for negative feedback. On the other hand, when it is desired to obtain high output power, the input signal Vs is applied to the negative feedback amplifier circuit 200 as shown in the circuit example of FIG. It is used as a BTL connection so that the output of the negative feedback amplifier circuit 300 is applied to the other terminal of the load (Lx, s). At this time, the non-inverting input terminal of the negative feedback amplifier circuit 300 is grounded through the capacitor C1.

しかしこの2通りの使用方法を1個の集積回路に薫用さ
せる拳は従来の集積回路では大変難かしく、また切換え
に多数の外付は部品を必要とした。
However, it is very difficult to use a single integrated circuit for these two methods of use with conventional integrated circuits, and a large number of external parts are required for switching.

本発明の目的は、これらデュアルアンプとBTLアンプ
の2通シの機能を兼用する事ができ、しかも切換え回路
を自振する◆によシこれらの機能切換えが容易な集積回
路化されたt力増物器を提供するにある。
The object of the present invention is to provide an integrated circuit integrated circuit that can serve both of the functions of the dual amplifier and the BTL amplifier, and also allows the switching circuit to self-oscillate. It is in providing an extender.

以下に図面を参照して本発明をより畦細に欣明する。The present invention will be explained in more detail below with reference to the drawings.

第3図は本発明の具体的一実施例である。一点鎖線10
0が集積回路である。集積回路10−6は負帰還電力増
幅回路200及び300、切換え回路400%スイッチ
回路sw、、sw!、sw、 で−maされている。さ
らに集積回路100は信号入力端子a及び0%帰還端子
す及びd1出力端子f及びg1BTL用帰還端子i1切
換え回路制御端子J1電源供給端子h1接地端子Cを有
している。また外付けのスイッチ8Wa、SWb、SW
cは連動である。
FIG. 3 shows a specific embodiment of the present invention. dashed line 10
0 is an integrated circuit. The integrated circuit 10-6 includes negative feedback power amplifier circuits 200 and 300, switching circuits 400% switch circuits sw, sw! , sw, is -ma'd. Furthermore, the integrated circuit 100 has a signal input terminal a, a 0% feedback terminal, a d1 output terminal f, and a feedback terminal for BTL, i1, a switching circuit control terminal, J1, a power supply terminal, h1, and a ground terminal, C. In addition, external switches 8Wa, SWb, SW
c is interlocking.

いま、スイッチSWaが第3図の位置にあるとすれば、
切換え回路制御端子jが開放状態でスイッチ回路SW、
が導通状態、スイッチ回路SW、及びSW、が開放状態
となり、信号入力端子a及びCはそれぞれ負帰還増幅器
1IvI[g回路200及び300の非反転入力端子に
接続される。さらに、出力端子g及びf[、それぞれス
イッチSWb及び8Wcを介して結合コンデンサC3及
びC4の一端に接続される。
If the switch SWa is now in the position shown in Figure 3,
When the switching circuit control terminal j is open, the switching circuit SW,
is in a conductive state, switch circuits SW and SW are in an open state, and signal input terminals a and C are connected to non-inverting input terminals of negative feedback amplifiers 1IvI[g circuits 200 and 300, respectively. Furthermore, output terminals g and f[ are connected to one ends of coupling capacitors C3 and C4 via switches SWb and 8Wc, respectively.

この時信号源Vs、により信号入力端子aに加えられた
信号は、負帰還電力増幅回路200によって増幅されて
出力端子gよ多出力され、スイッチswb。
At this time, the signal applied to the signal input terminal a by the signal source Vs is amplified by the negative feedback power amplification circuit 200 and outputted to the output terminal g, and then to the switch swb.

結合コンデンサC3を介して負荷抵抗RL、に出力され
る。同様にして、信号源Vs、によ)信号入力端子Cに
加えられた信号は、負帰還電力増幅回路300により増
幅されて負荷抵抗RL、に出力される。この様にして集
積回路100はデュアルアンプとして機能する。
It is output to the load resistor RL via the coupling capacitor C3. Similarly, a signal applied to the signal input terminal C by the signal source Vs is amplified by the negative feedback power amplifier circuit 300 and output to the load resistor RL. In this manner, integrated circuit 100 functions as a dual amplifier.

一方、スイッチSWaによシ切換え回路制御端子jが接
地される場合には、スイッチ回路SW、及びSW、が導
通状態、スイッチ回路SW、が開放状態となる。この時
信号入力端子aは直接に、また信号入力端子Cはスイッ
チ回路S鳥を介して共に負帰還電力増幅器200の非反
転入力端子に接続され、負帰還電力増幅器300の非反
転入力端子はスイッチ回路SW、によ#)信号入力端子
Cと分離される。
On the other hand, when the switching circuit control terminal j is grounded by the switch SWa, the switch circuits SW and SW are in a conductive state and the switch circuit SW is in an open state. At this time, the signal input terminal a is connected directly, and the signal input terminal C is connected to the non-inverting input terminal of the negative feedback power amplifier 200 via the switch circuit S, and the non-inverting input terminal of the negative feedback power amplifier 300 is connected to the switch. The circuit SW is separated from the signal input terminal C.

このとき負帰還増幅器300の非反転入力端子が内部で
バイアスされていない場曾は、スイッチ回路SW、によ
シ非反転入力端子を基準電位に接地する。さらに、負帰
還−力増幅回路200の出力端子gは、抵抗R3及びス
イッチ回路SW3を介してBTL用帰還端子iに接続さ
れる。また、出力端子g及びfはスイッチ回路す及び8
Wcを介して負荷抵抗RL、と接続され、結合コンデン
サC1及びC4とは分離される。この時信号源Vs1に
よシ伯号入力端子aに加えられた信号と、信号源Vs、
により信号入力端子Cに加えられた信号は、スイッチ回
路sw、t−介して混合され共に負帰還電力増幅回路2
00の非反転入力端子に伝達される。そして負帰還電力
増幅回路200により増幅された信号は出力端子gより
負荷抵抗RL、に出力される。同時に、出力端子gに出
力された信号は抵抗も及びスイッチ(ロ)路SW、を介
してBTL#3帰還端子iに伝達され、抵抗R1とR1
とによυ減哀されて帰還コンデンサC1を介して帰還端
子dに伝達される。そして負帰還電力増幅回路3000
反転入力端子に加えられた信号は、反転出力として出力
端子fよシ負荷抵抗RL、に出力される。この様にして
集積回路100はBTLアンプとして機能する。
At this time, if the non-inverting input terminal of the negative feedback amplifier 300 is not internally biased, the switch circuit SW grounds the non-inverting input terminal to the reference potential. Furthermore, the output terminal g of the negative feedback force amplification circuit 200 is connected to the BTL feedback terminal i via a resistor R3 and a switch circuit SW3. In addition, output terminals g and f are connected to switch circuits and 8.
It is connected to the load resistor RL via Wc, and is separated from the coupling capacitors C1 and C4. At this time, the signal applied to the signal input terminal a by the signal source Vs1 and the signal source Vs,
The signals applied to the signal input terminal C by
00 non-inverting input terminal. The signal amplified by the negative feedback power amplification circuit 200 is output from the output terminal g to the load resistor RL. At the same time, the signal output to the output terminal g is transmitted to the BTL #3 feedback terminal i via the resistor and the switch (b) path SW, and is transmitted to the BTL#3 feedback terminal i through the resistors R1 and R1.
The signal is transmitted to the feedback terminal d via the feedback capacitor C1. And negative feedback power amplifier circuit 3000
A signal applied to the inverting input terminal is output as an inverting output to the output terminal f and the load resistor RL. In this manner, integrated circuit 100 functions as a BTL amplifier.

尚、不実施例においては抵抗R,、1−L4及び馬が集
積回路lOOの内部に含まれている#iJ会を示したが
、内部に含まれない場合でも同様である。
In the non-embodiment, the #iJ group is shown in which the resistors R, , 1-L4 and the resistors are included inside the integrated circuit lOO, but the same applies even if they are not included therein.

以上述べた様に本発明によれば、デュアルアンプとして
のまたBTLアンプとしての機能を兼用する事ができ、
しかも機能の切換えが容易な、集積回路化された電力増
幅器を実現する事ができる。
As described above, according to the present invention, it is possible to function as both a dual amplifier and a BTL amplifier.
Moreover, it is possible to realize an integrated circuit power amplifier whose functions can be easily switched.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は従来のデュアルアンプの一例を示す回路プロ、
り図である。 第2図は従来のBTLアンプの一例を示す回路プロ、り
図である。 第3図は本発明の一実施例を示す回路ブロック図でおる
。 100・・・・・・集積回路、200,300・・・・
・・負帰還電力tJ#1幅回路、400・・・・・・切
換え回路、8W、〜SW。 ・・・・・・クイ2才回路、Vs、〜Vs、・・・・・
・信号源、R8−R1・・・・・抵抗、KL1〜KL、
・・・・・・負荷抵抗、C1〜C。 ・・・・・・コンテンプ、5WaA−8Wc・・°・°
°スイッナ、 a、C・・・・・・信号入力端子、b、
d・・・・・・帰還端子、e・・・・・・接地端子、f
、g・・・・・・出力端子、h・・・・・・電称供給端
子、i・・・・・・BTLJ41fi達端子、j・・・
・・・切換え端子。
Figure 1 shows an example of a conventional dual amplifier circuit.
This is a diagram. FIG. 2 is a circuit diagram showing an example of a conventional BTL amplifier. FIG. 3 is a circuit block diagram showing one embodiment of the present invention. 100... integrated circuit, 200, 300...
...Negative feedback power tJ#1 width circuit, 400...Switching circuit, 8W, ~SW. ...Qui 2-year-old circuit, Vs, ~Vs, ...
・Signal source, R8-R1...Resistance, KL1-KL,
...Load resistance, C1 to C. ...Contemp, 5WaA-8Wc...°・°
°Switcher, a, C...Signal input terminal, b,
d...Feedback terminal, e...Grounding terminal, f
, g...Output terminal, h...Electronic supply terminal, i...BTLJ41fi terminal, j...
...Switching terminal.

Claims (1)

【特許請求の範囲】[Claims] 非反転及び反転入力端子と出力端子とを有する第1の負
・帰還電力増幅回路と、前記第1の負帰還電力増幅回路
と同一構成の第2の負帰還電力増幅回路と、前記第1の
負帰還電力増幅回路の非反転入力端子に接続される纂1
の信号入力端子と、前記第2の負帰還電力増幅回路の非
反転入力端子と第2の信号入力端子との閾に設けられ前
記第2の負帰還電力増幅回路の非反転入力端子を第2の
信号入力端子より分離または接続する第1のスイッチ回
路と、前記第1の負帰還電力増幅回路の非反転入力端子
と前記第2の信号入力端子との闇に設けられ前記第1゛
の負帰還電力増幅回路の非反転入力端子を前記第2の信
号入力端子より分離または接続する第2のスイッチ回路
と、前記WJ1の負帰還電力増幅回路の出力端子と前記
第2の負帰還電力増幅回路の反転入力端子との間に設け
られ前記第1の負帰還電力増1階回路の出力端子を前記
第2の負帰還を力増幅回路の反転入力端子より分喉また
は接続する第3のスイッチ回路と、前記第1のスイッチ
回路の状態と前記第2及び第3のスイッチ回路の状態と
を互いに逆の状態となる様に制御する切換え回路と、前
記切換え回路を駆動する切換え端子とを含むことを特徴
とする来秋回路装置。
a first negative feedback power amplifier circuit having non-inverting and inverting input terminals and an output terminal; a second negative feedback power amplifier circuit having the same configuration as the first negative feedback power amplifier circuit; Wire 1 connected to the non-inverting input terminal of the negative feedback power amplifier circuit
and a non-inverting input terminal of the second negative feedback power amplification circuit, and a second signal input terminal of the second negative feedback power amplification circuit. a first switch circuit that is separated from or connected to the signal input terminal of the first negative feedback power amplifier circuit; a second switch circuit that separates or connects the non-inverting input terminal of the feedback power amplifier circuit to the second signal input terminal; and an output terminal of the negative feedback power amplifier circuit of the WJ1 and the second negative feedback power amplifier circuit. a third switch circuit that is provided between the inverting input terminal of the power amplifying circuit and the output terminal of the first negative feedback power amplifying circuit and the second negative feedback circuit being connected to the inverting input terminal of the power amplifying circuit; and a switching circuit that controls the state of the first switch circuit and the states of the second and third switch circuits to be opposite to each other, and a switching terminal that drives the switching circuit. Next fall circuit device featuring.
JP56194151A 1981-12-02 1981-12-02 Integrated circuit device Pending JPS5895412A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP56194151A JPS5895412A (en) 1981-12-02 1981-12-02 Integrated circuit device
US06/446,131 US4494077A (en) 1981-12-02 1982-12-02 Amplifier system switchable between two amplifying operations
US06/639,296 US4596957A (en) 1981-12-02 1984-08-10 Amplifier system switchable between two amplifying operations

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56194151A JPS5895412A (en) 1981-12-02 1981-12-02 Integrated circuit device

Publications (1)

Publication Number Publication Date
JPS5895412A true JPS5895412A (en) 1983-06-07

Family

ID=16319760

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56194151A Pending JPS5895412A (en) 1981-12-02 1981-12-02 Integrated circuit device

Country Status (1)

Country Link
JP (1) JPS5895412A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6385917U (en) * 1986-11-21 1988-06-04

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4834654A (en) * 1971-09-08 1973-05-21
JPS4837602B1 (en) * 1972-07-04 1973-11-12

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4834654A (en) * 1971-09-08 1973-05-21
JPS4837602B1 (en) * 1972-07-04 1973-11-12

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6385917U (en) * 1986-11-21 1988-06-04
JPH0516726Y2 (en) * 1986-11-21 1993-05-06

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