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| lt6201cs8资料 | |
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lt6201cs8 |
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file size : 116 kb
manufacturer:linear description:the input for the integrator-feedback buffer a7 is selected by the fet switches q4 and q5 during the bias current and offset voltage offset current tests a7 is connected as an integrator and receives its input from the output of the de- vice under test the output of a7 drives the feedback resis- tor r40 in this connection the integrator holds the output of the device under test near ground and serves to amplify the voltages corresponding to bias current offset current and offset voltage by a factor of 1 000 before presenting them to the measurement system fet switches q4 and q5 are turned on by switch section s1b during these tests fet switches q4 and q5 are turned off during the transfer function test this disconnects a7 from the output of the device under test and changes it from an integrator to a non-inverting unity gain amplifier driven from the triangular wave output of the function generator through the attenua- tor r33 and r34 and switch section s1a in this connection amplifier a7 serves two functions first to provide an offset voltage correction to the input of the device under test and second to drive the input of the device under test with a g2 5 mv triangular wave centered about the offset voltage during this test the common mode driver amplifier is dis- abled by switch section s1a and the vertical input of the measurement oscilloscope is transferred from the output of the integrator-buffer a7 to the output of the device under test by switch section s1d s2a allows supply voltages for the device under test to be set at g5 g10 g15 or g20v s2b changes the vertical scale factor for the measurement oscilloscope to maintain optimum vertical deflection for the particular power supply voltage used s4 is a momentary contact pushbutton switch which is used to change the load on the device under test from 10 kx to 2 kx a delay must be provided when switching from the input tests to the transfer function tests the purpose of this delay is to disable the integrator function of a7 before driving it with the triangular wave if this is not done the offset cor- rection voltage stored on c16 will be lost this delay be- tween opening fet switch q4 and switch q5 is provided by the rc filter r35 and c19 resistor r41 and diodes d7 and d8 are provided to control the integrator when no test device is present or when a faulty test device is inserted r41 provides a dc feedback path in the absence of a test device and resets the integra- tor to zero diodes d7 and d8 clamp the input to the integra- tor to approximately g 7 volts when a faulty device is inserted fet switch q1 and resistor r28 provide a ground reference at the beginning of the 50-ohm-source offset-voltage trace this trace provides a ground reference which is indepen- dent of instrument or oscilloscope calibration the gate of q1 is driven by the output of monostable multivibrator a5 and shorts the vertical oscilloscope drive signal to ground during the time that a5 output is positive switch s3 r27 and r28 provide a 5x scale increase during input parameter tests to allow measurement of amplifiers with large offset voltage offset current or bias current switch s5 allows amplifier compensation to be changed for 101 or 709 type amplifiers |
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| 1pcs | 100pcs | 1k | 10k | ||
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型 号：lt6201cs8 厂 家：linear 封 装：0529 批 号：smd/dip 数 量：3002 说 明： |
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运 费： 所在地： 新旧程度： |
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| 联系人：林浩/林妮 |
| 电 话：0755-82532799/82532766/83989559 |
| 手 机：13510168121/13725556003 |
| qq：496982847/351622092 |
| msn：linearic@hotmail.com |
| 传 真：0755-82532766 |
| email：maxim_zi@126.com |
| 公司地址： 深圳市福田区佳和大厦b座1802室 门市部：华强广场 q2a114展销柜 |
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