子分类：
| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 161 | Level meter circuit | US701910 | 1976-07-01 | US4063170A | 1977-12-13 | Kozo Kobayashi |
| A level meter circuit for indicating a level of input signal over a wide dynamic range, comprising an amplifier of relatively high amplification factor having input terminal means to which an input signal is supplied and output terminal means to be connected to a level meter and negative feedback means including a feedback resistance to feedback an output signal from said output terminal means to said input terminal means, said negative feedback means characterized by further including non-linear impedance means connected in parallel to said feedback resistance and having such characteristics that when said output signal from said output terminal means is below a predetermined level said non-linear impedance means has a substantially infinite impedance and when said output signal from said output terminal means reaches said predetermined level said non-linear impedance means has a predetermined impedance. | ||||||
| 162 | Electronic measuring instrument arrangement for measuring electrical A-C quantities | US47370074 | 1974-05-28 | US3916310A | 1975-10-28 | STARK REINHARD; SCHWENDTNER MANFRED; STEINMULLER GUNTER |
| An arrangement for measuring electrical alternating current quantities using an electronic measuring instrument in which the alternating current quantities to be measured are isolated from the electronic components of the measuring instrument in such a way that the errors introduced by such isolation are eliminated by using a current comparator at the input to the measuring instrument.
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| 163 | Compensating techniques for sensitive wide band voltmeters | US37958273 | 1973-07-16 | US3857097A | 1974-12-24 | JUELS R |
| A wide band voltmeter is capable of measuring the amplitude of AC signals over large ranges of frequency and amplitude. Such a voltmeter uses a mixer which has an input circuit channel that receives the AC signal and another input which receives a signal from a swept oscillator whose frequency is varied by a sawtooth generator to determine the range of magnitude of the input frequency to the mixer. This enables wide band operation of the voltmeter with increased accuracy. The mixer has a conversion efficiency which is dependent upon frequency, this dependency is also true of the input circuitry associated with the AC input to the mixer. In order to compensate for this dependency and to assure that all frequencies are treated equally, a series of theshold devices monitor the sawtooth or sweep waveform and provide a control signal, which signal is used to substantially compensate for the frequency dependency of the mixer and associated input circuitry to therefore enable the provision of a proper indication of the magnitude of the AC signal relatively independent of frequency. This invention relates to signal amplitude measuring apparatus and more particularly to compensating techniques useful in conjunction with such apparatus for performing extremely accurate measurements over a wide range of frequencies.
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| 164 | Voltage-current sensing system for welders and the like | US3725637D | 1971-05-06 | US3725637A | 1973-04-03 | WENRICH C; DOWNS B |
| This invention relates to a system for making a record of the amount of work actually produced by an arc welder or similar machine for a given period of time. The arc welder may be energized, for example, for eight hours but may be actually welding for only four or five hours. The system includes a current sensor which records only when at least minimum arc currents flow, and a voltage sensor which records only when at least voltages sufficient to sustain an arc and which are greater than those at which short circuit occur. The simultaneous occurrence of both such currents and voltages is necessary for recording.
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| 165 | Meter driver circuit having intiial overdrive and means to discharge a storage circuit at a constant rate | US3649911D | 1970-03-27 | US3649911A | 1972-03-14 | SWANSON HILMER I |
| A meter driver circuit for improving the responsiveness of a meter to an electrical signal being measured. The signal being measured is applied through a first charging circuit which is in series with the meter to apply a temporary pulse to the meter. The pulse temporarily overdrives the meter to overcome the inertia and friction of the meter. The initial pulse decays according to the time constant of the charging circuit. A second charging circuit is provided in the form of a capacitor which is in parallel with the input signal and a transistor which is in parallel with the capacitor. The transistor is biased in such a way as to provide a linear discharge path for the capacitor. The output of the transistor is coupled directly to the meter to provide a linear discharge. By means of the linear discharge circuit, the meter receives increased energy while meeting the F.C.C. specifications.
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| 166 | Low frequency band-pass filter for use in failsafe applications | US3588533D | 1968-08-15 | US3588533A | 1971-06-28 | RHOTON RICHARD S |
| A LOW FREQUENCY BAND-PASS FILTER IS OF A CONSTRUCTION INHERENTLY PROVIDING A SINGLE PREDETERMINED OUTPUT MODE UNDER ANY CONDITIONS OF FAILURE OF ITS INDIVIDUAL COMPONENTS OR COMBINATIONS THEREOF. THE FILTER EMPLOYS COOPERATION BETWEEN THE Q OF A RESONANT CIRCUIT, A RESISTIVE DIVIDER, AND A THRESHOLD CIRCUIT TO DEFINE PASS BANDWIDTH.
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| 167 | Monitoring system | US3548403D | 1967-06-12 | US3548403A | 1970-12-15 | JOHNSON ALLEN L |
| 168 | Automatic engine starting system | US61842267 | 1967-02-24 | US3414734A | 1968-12-03 | KONRAD PHILIP S |
| 169 | Electrical energy measuring device | US23209362 | 1962-10-22 | US3240961A | 1966-03-15 | NOTH MYRON A |
| 170 | Circuit for measuring rms value of pulses using an integrating circuit with predetermined time constant | US8323261 | 1961-01-17 | US3201688A | 1965-08-17 | FERGUSON HUGO S |
| 171 | Surface field effect transistor amplifier | US74239058 | 1958-06-16 | US3040266A | 1962-06-19 | RALPH FORMAN |
| 172 | Electrical measuring means for measuring welding current flow | US53265755 | 1955-09-06 | US2897444A | 1959-07-28 | JOHN GARSCIA ALFONS; FINDLAY RODGER ROBERT |
| 173 | Resistance welding current indicating device | US29564452 | 1952-06-26 | US2748380A | 1956-05-29 | PLATTE WILLIAM N; ROBERTS WILLIAM L |
| 174 | Measuring circuit | US19640750 | 1950-11-18 | US2665395A | 1954-01-05 | FEINBERG ALBERT E |
| 175 | Impulse measuring and recording apparatus | US26980539 | 1939-04-24 | US2255473A | 1941-09-09 | RICH THEODORE A |
| 176 | Measuring instrument | US18235 | 1935-01-02 | US2149558A | 1939-03-07 | CARROLL STANSBURY; ARTHUR SIMON |
| 177 | シャント抵抗器およびシャント抵抗器を用いた電流検出装置 | JP2017026361 | 2017-02-15 | JP2018132422A | 2018-08-23 | 遠藤 保 |
| 【課題】取付け作業が簡便で、過大な取付けスペースも必要とせず、高精度の電流検出が可能なシャント抵抗器およびその実装構造を提供する。 【解決手段】導電性の金属材からなる第1端子および第2端子と、第1端子と第2端子との間に配置された抵抗体と、を有し、第1端子と第2端子には、それぞれ貫通孔が形成され、少なくとも第1端子または第2端子のいずれか一方の、抵抗体との接合部位と反対側に突出する突出部を備えた、シャント抵抗器。 【選択図】図1 |
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| 178 | チップ抵抗器およびその製造方法 | JP2017549344 | 2017-04-26 | JPWO2017188307A1 | 2018-05-17 | 木下 泰治; 星徳 聖治; 坪田 博典; 鹿島 康浩 |
| チップ抵抗器は、抵抗体と、抵抗体の下面に設けられた第1と第2の電極と、第1と第2の電極との間において抵抗体の下面に設けられた保護膜とを備える。抵抗体には、下面から延びて第1の端面に沿って設けられて上面に達しない第1の凹部と、下面から延びて第2の端面に沿って設けられて上面に達しない第2の凹部とが設けられている。第1と第2の電極は第1と第2の凹部の間に位置する。保護膜は第1と第2の電極の間に設けられている。第1のめっき層が第1の凹部の内面と第1の電極とに亘って設けられている、第2のめっき層が第2の凹部の内面と第2の電極とに亘って設けられている。このチップ抵抗器により実装不良が生じる可能性を低減できる。 | ||||||
| 179 | シャント抵抗器およびその実装方法 | JP2016143302 | 2016-07-21 | JP2018014420A | 2018-01-25 | ▲高▼石 淳平; 林 敬昌 |
| 【課題】シャント抵抗器の回転方向のずれに対してもボンディング位置を補正可能なシャント抵抗器およびその実装方法を提供する。 【解決手段】このシャント抵抗器は、予め抵抗率が設定された抵抗体を有し、2つの電極の間を架橋して、抵抗体による電圧降下を検出することにより電極の間に流れる電流の電流値を検出するためのボンディングワイヤが接続される。シャント抵抗器は、電極に電気的に接続される一対の接続部と、抵抗体を含み、一方の接続部から他方の接続部へ延設され、2つの接続部の間を架橋する架橋部と、を備える。さらに、ボンディングワイヤが接続される一面を正面視して撮影された場合に、仮想線分(L)が定義可能なマークを有するものであり、シャント抵抗器に固定された仮想線分と、予め規定された直線との角度差θを検出し、角度差θに応じてボンディングワイヤの接続位置を補正する。 【選択図】図2 |
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| 180 | 電流測定装置 | JP2016138468 | 2016-07-13 | JP2018009863A | 2018-01-18 | 遠藤 保; 大澤 亮 |
| 【課題】インバータ回路等を備える電流測定装置において、電流検出素子としてシャント抵抗器を用いた場合におけるインダクタンスを低減する。 【解決手段】導電性の金属で形成した第1の配線部材と、導電性の金属で形成されるとともに、一部に抵抗体金属を備えた第2の配線部材と、を有し、前記第1の配線部材と前記第2の配線部材とは、少なくとも前記抵抗体金属を備えた部位において、絶縁体を介して併設した、電流測定装置。 【選択図】図2 |
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