Measuring Instruments

Page 33 (A Schmitt Trigger Using the Operational Amplifier)

BWD minilab - A Schmitt Trigger Using the Operational Amplifier

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Table of Contents

Product View2
Table of Contents2
General Information3
Performance4
Function Generator4
Selectable Power Source5
Voltage/Operational Amplifier5
Low Voltage Power Supplies6
High Voltage Power Supply6
AC Supply6
Facilities by Interconnection6
General Details7
Accessories List8
Controls and Their Functions10
Signal Source Controls10
Amplifier Section Controls12
Power Supply Section Controls12
Operation14
Operation of the Function Generator15
Operation of the Power Amplifier18
Operation of the Bi-Polar Power Supply19
Operation of the +5V Fixed Power Supply19
Operation of the Voltage Amplifier20
Operation of the Operational Amplifier20
Operation of the + and - 15V Variable, Regulated Power Supplies22
6.3V - 0 - 6.3V AC Output23
Operation of the 0 to 200V Power Supply24
Applications25
Frequency Modulation and De-Modulation25
Amplitude Modulation and De-Modulation26
Obtaining Frequency Sweep in Conjunction with an Oscilloscope27
Logarithmic Frequency Sweep27
Linear Frequency Sweep28
Use of Amplifiers in a Simple Radio Receiver29
Use of Amplifiers in a Simple Public Address System29
When Bridge Oscillator Using the Operation Amplifier31
A Comparator Using the Operational Amplifier32
A Schmitt Trigger Using the Operational Amplifier33
Adding the Power Supplies in Series to Produce Higher Voltage Ranges34
Superimposition of AC Signals on a DC Power Source35
Miscellaneous Waveforms Using Symmetry Control35
Miscellaneous Waveforms by Clipping36
Miscellaneous Waveforms by Frequency Modulating the Function Generator36
Miscellaneous Waveforms Produced by Amplitude Modulation37
Circuit Description38
Triangle and Square Wave Generators38
TTL Output40
Sine Wave Shaper40
Amplitude Modulator41
Function Generator Output Amplifier41
Ramp Generator41
Variable 0-200V Power Supply42
Power Amplifier/Bi-Polar Power Supply/5V Supply42
+Ve and -Ve 15V Regulated Variable Power Supplies43
+Ve and -Ve 15V Regulated Fixed Power Supplies43
Power Rectifiers and Filters43
Alignment44
Test Instrument Required44
RV320 Set +15V Fixed Supply45
RV321 Set -15V Fixed Supply45
RV1 Set Maximum Frequency46
RV3 Set Minimum Frequency46
RV5 Set 1:1 Symmetry46
C24 Adjustment47
C23 Set 2.0Mhz47
C16 Set 1.0Mhz48
C14 Set 0.1Mhz48
Output Amplifier Offset Adjustment48
Triangle Buffer Amplifier Offset and High Frequency Offset Adjustments49
Amplifier Modulator Adjustments49
Sine Wave Shaper Adjustments50
RV202 Set X100 Gain (OP Amp)51
RV203 DC Offset (OP Amp)51
RV204 Set Maximum Voltage (0-200V)51
RV300 Set Maximum Voltage (+1 to +15V)52
RV302 Set Maximu Voltage (-1 to -15V)52
PC Boards View53
Maintenance57
Removal of Covers57
Removal of Heatsinks57
Removal of Integrated Circuits57
Repair of Printed Circuit Boards58
Removal of Front Panel Controls58
Removal of the Frequency Dial and Control59
Parts List60
Schematic Diagram73

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