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1. 发明专利

JP3677181B2 Variable resistor circuit and d / a converter 有权
公开(公告)号：JP3677181B2
公开(公告)日：2005-07-27
申请号：JP25192399
申请日：1999-09-06
申请人：株式会社東芝
发明人：満永田
IPC分类号： H03M1/08 , H01C10/06 , H01C13/00 , H03M1/66 , H03M3/02 , H03M3/04
CPC分类号： H03M3/346 , H03M3/502

2. 发明专利

JP2003500849A Variable resistance device and method 有权
公开(公告)号：JP2003500849A
公开(公告)日：2003-01-07
申请号：JP2000620640
申请日：2000-05-11
申请人：バラタッチテクノロジーインコーポレイテッド
发明人：アランイー．スクラム， , マイケルディー．ロジャース，
IPC分类号： G05G9/047 , H01C10/06 , H01C10/10
CPC分类号： H01C10/06 , G05G2009/04744
摘要： (57)【要約】可変抵抗デバイスは抵抗性ゴム材料（７４）を有する抵抗性部材を含む。基板（７２）上の第１の導体（７８）および第２の導体は、第１の接触面積にわたる第１の接触位置と、第２の接触面積にわたる第２の接触位置とで、それぞれ抵抗性部材（７４）と電気的に結合するように構成される。第１の接触位置での第１の導体と第２の接触位置での第２の導体との間の抵抗は、直列の抵抗成分と並列パスの抵抗成分との和に等しい。直列の抵抗成分は、接触位置間の距離が、それぞれ増加または減少するにつれて、増加または減少する。接触位置および接触面積を変化させることにより、抵抗の変化が並列または直列の抵抗成分によって支配され得るように、その成分を予め設定する。

3. 发明专利

JP2001077694A VARIABLE RESISTOR CIRCUIT AND D/A CONVERTER 失效
公开(公告)号：JP2001077694A
公开(公告)日：2001-03-23
申请号：JP25192399
申请日：1999-09-06
申请人： TOSHIBA CORP
发明人： NAGATA MITSURU
IPC分类号： H03M1/08 , H01C10/06 , H01C13/00 , H03M1/66 , H03M3/02 , H03M3/04
摘要： PROBLEM TO BE SOLVED: To provide a D/A converter free from hung up sound, capable of increasing the number of steps for equivalently varying the resistance value of feedback resistance without causing increase of a circuit scale. SOLUTION: As for a variable resistor circuit 236, in a 1-bit D/A converter with a 0 data detecting soft mute function, resistors R21 to R34 are serially connected, first analog switches SW21 to SW34 to be selectively turned on/off in accordance with an output signal, except for the LSB of a counter are provided at respective connecting points to constitute a first digitally controlled variable resistor, resistors R35, R36 are connected in parallel, a second analog switch SW36 to be controlled by the LSB of the counter is serially connected to a resistor on one side to constitute a second digitally controlled variable resistor, both of the first and second digitally controlled variable resistors are serially connected and a third analog switch SW35 is connected to both of the ends to constitute a feedback resistor. Then, a feedback resistance value is reduced step by step to finally turn on the third analog switch to shortcircuit.

4. 发明专利

JP3036410B2 失效
公开(公告)号：JP3036410B2
公开(公告)日：2000-04-24
申请号：JP25787295
申请日：1995-10-04
IPC分类号： H01R4/48 , H01C1/14 , H01C7/10 , H01C10/00 , H01C10/04 , H01C10/06 , H01C13/00 , H01R13/15

5. 发明专利

JPH0677013A VARIABLE RESISTOR 失效
公开(公告)号：JPH0677013A
公开(公告)日：1994-03-18
申请号：JP22446592
申请日：1992-08-25
申请人： FUJI ELECTRIC CO LTD
发明人： MATSUZAKI KAZUO
IPC分类号： H01C10/06 , H01C10/16 , H01C10/50 , H01C13/02
摘要： PURPOSE:To contrive miniaturization of a variable resistor by a method wherein a fixed resistor laminated body is formed by laminating the fixed resistors of a plurality of unit resistors using the respective fixed resistor of a variable resistor as a thin film fixed resistor. CONSTITUTION:Thin film type fixed resistors 11 to 14 are formed by providing conductive thin films 11a to 14a as an electrode board on one side and conductive thin films 11b to 14b as an electrode board on the other side leaving intervals between them. Electric resistance thin films 11c to 14c are laminated on the above-mentioned pair of conductive thin films, and electric insulating thin films lid to 14d are laminated, as intermediate insulating layers or sheathing insulating layers, on the above-mentioned conductive thin films 11a to 14, 11b to 14b and electric resistance thin films 11c to 14c. Besides, these fixed resistors 11 to 14 are laminated successively on an insulated substrate la, and a fixed resistor laminated body 7 is formed. As a result, the occupation area of all the fixed resistors is made equal to the area of one fixed resistor, and a variable resistor can be made small in size.

6. 实用新型

JPH0563001U 失效
公开(公告)号：JPH0563001U
公开(公告)日：1993-08-20
申请号：JP949992
申请日：1992-01-31
IPC分类号： H01C10/06 , H01C13/00 , H01C17/22 , H01P1/22

7. 发明专利

JPH04130603A ELECTRON VARIABLE RESISTOR AND TIMER SIGNAL GENERATOR 失效
公开(公告)号：JPH04130603A
公开(公告)日：1992-05-01
申请号：JP25111790
申请日：1990-09-20
申请人： FUJITSU LTD
发明人： NAKAJIMA TAKASHI , HAYAKAWA TOSHIFUMI
IPC分类号： H01C10/06 , H01C13/00
摘要： PURPOSE:To make it possible to adjust and output automatically the combined resistant value of (n) pieces of fixed resistance elements by a method wherein the title generator is provided with a switching element consisting of a bipolar transistor or a field-effect transistor and (n) pieces of unit resistance selecting means, which respectively comprises each fixed resistance element. CONSTITUTION:In the case where more than one of unit resistance selecting means 11 are provided and the means 11 are series-connected and in the case where a switching element Ti is constituted of a bipolar transistor TrQ, the selective/ nonselective operation of a fixed resistance element Ri parallel-connected between a collector and an emitter of this TrQ can be performed. That is, when a control signal SWi=H level is inputted in a base of the transistor TrQ by a signal output means 12 on the basis of external set data Din, the TrQ is turned-ON and both ends of the element Ri is electrically short-circuited. Thereby, the equivalent resistance values of both ends of the element Ri become a resistance value dropped from the combined resistance value of fixed resistance elements R1 to Rn at the time of a signal SWi=L level. As a result, it becomes possible to perform the selective/ nonselective processing of (n) pieces of the series-connected fixed resistance elements R1 to Rn. Even if a FET is used instead of the TrQ, the similar operation can be performed.

8. 发明专利

JPH0239842B2 失效
公开(公告)号：JPH0239842B2
公开(公告)日：1990-09-07
申请号：JP3763284
申请日：1984-02-28
申请人： TLV CO LTD
发明人： MYATA OSAMU
IPC分类号： H01C1/125 , G01D5/16 , G01D5/165 , H01C10/00 , H01C10/06

9. 发明专利

JPH01202804A REGULATING TYPE RESISTOR, ITS REGULATING DEVICE AND REGULATING METHOD FOR THE SAME RESISTOR 失效
公开(公告)号：JPH01202804A
公开(公告)日：1989-08-15
申请号：JP2731088
申请日：1988-02-08
申请人： MURATA MANUFACTURING CO
发明人： NAKATSU YOSHIYUKI , MASUDA FUMITOSHI
IPC分类号： H01C10/06 , H01C17/22
摘要： PURPOSE:To prevent a proportionally divided resistance value from changing with time by providing a conductive part formed insulating from a resistor and a conductive substance formed extending over the part of the resistor in its extending direction and the conductive substance for short-circuiting the both on an insulating substrate. CONSTITUTION:A conductive part 20 formed insulating from a resistor 14 and a conductive substance 30 formed extending over the part of the resistor 14 in its extending direction and the part 20 for short-circuiting the both are provided on an insulating substrate 12. Thus, since the resistor 14 is connected by the substance 30 to the part 20 and the resistor 14 is connected to the part 20 without contact part, the resistance value is not changed with time upon deterioration of the contact part. In this manner, it can prevent a proportionally divided resistance value from changing with time.

10. 实用新型

JPS61153303U 失效
公开(公告)号：JPS61153303U
公开(公告)日：1986-09-22
申请号：JP3617085
申请日：1985-03-15
IPC分类号： H01C17/242 , H01C10/06 , H01C17/24

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