Analog Circuit

ERROR_TAKEOFF_REDUCES_DISTORTION

Published:2009/6/29 1:52:00 Author:May

Nonlinear distortion is reduced in singleended amplifier by producing voltage proportional to distortion and amplifying this error voltage in such a way thatit can be used to reduce distortion at output. Circuit uses 741 opamps and MJ4000 power Darlington transistors. Technique overcomes basic Iimitation of negative feedback wherein feedback loop gain decreases as frequency increases. Artide also gives variation of circuit more suitable for power amplifier, and describes circuit operation in detail.-A. M. Sandman, Reducing Amplifier Distortion, Wireless World, Oct. n974, p 367-371.   (View)

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DRIECT_DC_DRIVE_INTERFACE_OF_A_TRAC

Published:2009/6/29 1:42:00 Author:May

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50_kHz_BANDWIDTH

Published:2009/6/29 1:41:00 Author:May

Three transistor pairs in CA3600E array are parallel-connected with output stage of CA3130 bipolar M0S opamp to boost current-handling capability about 2.5 times. Use of feedback gives closed-loop gain of 48 dB. Typical large-signal bandwidth is 50kHz for 3 dB down-″Circuit ldeas for RCA Linear ICs、″RCA Solid State Division、Somerville,NJ,1977,p 12   (View)

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HIGH_SPEED_SHIELD_LINE_DRIVER_

Published:2009/6/29 1:39:00 Author:May

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COAXIAL_CABLE_DRIVER_

Published:2009/6/29 1:38:00 Author:May

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VARIABLE_BIPOLAR_CLAMPING

Published:2009/6/29 1:37:00 Author:May

Precision comparator provides independent regulation of both output voltage limits without connection to comparison inputs. A2 and A3 are complementary precision rectifiers having independent positive and negative reference voltages, with both rectifiers operating in dosed loop through A1. A2 senses positive peak of Eo and maintains it equal to +Vclamp by adjusting voltage applied to D1. A3 and D3 perform similar function on negative peaks. Feedback network around output stage of A1 regulatesoutput voltage independently of inputs to A1. —W. G. Jung, IC Op-Amp Cookbook, Howard W. Sams, Indianapolis, IN, 1974, p 228－229.   (View)

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SOLENOID_DRIVER_

Published:2009/6/29 Author:May

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CRT_YOKE_DRIVER_

Published:2009/6/28 23:59:00 Author:May

Circuit Notes A 500 mV peak-to-peak triangular waveform about ground is input to the amplifier，gtvmg rlse to a 100 mA peak current to theinductor，.   (View)

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CRT_DEFLECTION_YOKE_DRIVER_

Published:2009/6/28 23:57:00 Author:May

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HIGH_IMPEDANCE_METER_DRIVER_

Published:2009/6/28 23:56:00 Author:May

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HIGH_SPEED_LINE_DRIVER_FOR_MULTIPLEXERS

Published:2009/6/28 23:49:00 Author:May

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BIFET_CABLE_DRIVER

Published:2009/6/28 23:48:00 Author:May

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RELAY_DRIVER__

Published:2009/6/28 23:46:00 Author:May

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CAPACITIVE_LOAD_DRIVER

Published:2009/6/28 23:42:00 Author:May

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HIGH_SPEED_LASER_DIODE_DRIVER

Published:2009/6/28 23:41:00 Author:May

Circuit NotesA faster driver, can supply higher gate current to switch the VN64GA very quickly. The circuit uses a VMOS totemple, stage to drive the high power switch.   (View)

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LOW_EMISSION_CD

Published:2009/6/28 23:38:00 Author:May

Solid-state capacitor-discharge ignition system improves combustion efficiency by increasing spark duration. For 8-cylinder engine, normal CD system range of 180 to 300,ttS is increased to 600 ps below 4000 rpm the discharge lasts for one cycle or 300 pts because at higher speeds the power cycle has shorter times. Circuit uses 555 timer M1 as 2-kHz oscillator, with Q1-Q3 providing drive to Q4-Q5 and T, for converting battery voltage to about 400 VDC at output of bridge rectifier. When dis-tributor points open,Q7 turns on and triggers M2 connected as mono that provides gate drive pulses for SCR. Article describes operation of circuh in detail and gives waveforms at points a-i.-C. C. Lo, CD lgnition System Produces Low Engine Emissions, EDN Magazine, May 20, 1976, p 94, 96, and 98.   (View)

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LINE_DRIVER

Published:2009/6/28 23:23:00 Author:May

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50_OHM_DRIVER

Published:2009/6/28 23:21:00 Author:May

Circuit Notes To buffer a test generator to the outside world requires an amplifier with sufficient bandwidth and power handling capability. The circuit is a very simple unity gain buffer. It has a fairly high input impedance, a 50 ohm output impedance, a wide bandwidth, and high slew rate. The circuit is simply two pairs of emitter ollowers. The base emitter voltages of Q1 and Q2 cancel out, and so do those of Q3 and Q4.The preset is used to zero out any small dc offsets due to mismatching in the transistors.   (View)

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DRIVER_CIRCUITS

Published:2009/6/28 23:11:00 Author:May

Circuit NotesCM0S drivers for relays, lmps,speakers,etc, offers extremely low standby power. At Vcc = 15V, power dissipation per package is typically 750 nW when the outputs are not drawing current. Thus, the drivers can be sitting out on line (a telephone line, for example) drawing essentially zero current until activated.   (View)

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DECADE_FREQUENCY_DIVIDER

Published:2009/6/28 23:05:00 Author:May

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