Circuit Diagram

INDEPENDENT_SIGNALS

Published:2009/6/29 1:49:00 Author:May

Single AD521 instrumentation amplifier compares two independent signal levels from sources having no common reference point. When one differential signal is applied to usual input of opamp and other to reference input, output is proportional to difference. Positive feedback provides small amount of hysteresis, to eliminate ambiguity and reduce noise susceptibility. Stable threshold of about 25 mV is derived from AD580 low-oltage reference circuit. Reference voltage is 2.5 V, but values used for RSand RG are in ratio of 1 :100 so comparator output switches when normal input is about 1/100 of reference input.Output is negative when normal input is zero, and switches positive when input exceeds threshold. Output swings ±12 V as inputs go through critical ratio. R3 and D1 provide TTL-compatible second output.—A. P. Brokaw, You Can Compare Two Independent Signal Levels with Only One IC, EDN Magazine, Apri15, 1975, p 107－108.   (View)

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MEIER_THERMOMETER_WITH_TRIMMED_OUTPUT

Published:2009/6/29 1:49:00 Author:May

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60_W_WITH_AC_COUPLED_OUTPUT

Published:2009/6/29 1:48:00 Author:May

Uses Motorola complementary Darlington output transistors, with MJE6044 for Q5 and MJE6041 for Q6. For 8-ohm loudspeaker, Q1 is MPS-A06 Q2 is MPS-A56, Q3 is MPS-A13 and Q4 is MPS-A06 Supply is 72 V. R5 is Z20 ohms, and R7 is 68K Same circuit is used wjth different components for other output powers down to 15 W and for 4-ohm loudspeaker. Frequency response is 20 Hz to 50 kHz for -1 dB points.-R. G. Ruehs, 15 to 60 Watt Audio Amplifiers Using Comple mentary Darlington Output Transistors, Mo-torola, Phoenix, AZ, 1974, AN-4B3B, p 3.   (View)

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LOWER_POWER_THERMOMETER

Published:2009/6/29 1:48:00 Author:May

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Norton_high_voltage_inverting_amplifier

Published:2009/7/25 1:40:00 Author:Jessie

This circuit is an inverting amplifier with an output voltage swing from essentially 0 to +300 V. Any transistor can be used for Q1, provided that the breakdown voltage is greater than 300 V (because the full high voltage will be applied across Q1). Biasing resistor R3 is used to center the transfer characteristic, and the gain is set by the ratio of R2/R1. Load RL can be increased to reduce the high-voltage current drain, if desired.   (View)

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5_V_step_down_converter

Published:2009/7/25 1:27:00 Author:Jessie

This circuit provides 5-V output（adjustable）at 8A．Figure 4-21B shows component source information．   (View)

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Norton_low_frequency_mixer

Published:2009/7/25 1:26:00 Author:Jessie

This circuit shows a Norton used as a low-frequency mixer where two input frequencies produce a sum and difference frequency (in addition to other high-frequency components). The circuit has a gain of 10 and a low-pass single-pole filter (1 MΩ and 150 pF) with a comer frequency of 1 kHz. Relatively high frequencies can be applied at the inputs as long as the desired difference frequency is within the bandwidth capabilities of the amplifier and the RC low-pass filter. The difference frequency is filtered from the composite resulting waveform and is made available at the output.   (View)

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4_BIT_BCD_COMPARATOR

Published:2009/6/29 1:47:00 Author:May

Provides less than, equal to, or greater than comparison between setting of BCD thumbwheel switch at X and BCD input digit at Y (Y is count preset into 74192 up/down counter). If equality does not exist, circuit will count up ordown until it reaches equality, and thereby calculate difference between BCD values. Separate register can be used to store up or down counts required to reach equality.—R. A. Scher, Digital Comparator is Self-Adjusting, EDNMagazine, Sept. 1, 1972, p 51.   (View)

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5_V_step_down_converter_with_adjustable_current_limit

Published:2009/7/25 1:25:00 Author:Jessie

This circuit has an adjustable Vout, with an adjustable current limit，Figure 4-20B shows component source information.   (View)

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CENTIGTADE_THERMOEETER

Published:2009/6/29 1:47:00 Author:May

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5_V_adjustable_step_down_converter_with_a_fixed_current_limit_

Published:2009/7/25 1:24:00 Author:Jessie

This circuit has an adjustable Vout, with a fixed current limit of 5A.   (View)

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KELVIN_THERMOMETER_WITH_GROUND_REFERRED_OUTPUT

Published:2009/6/29 1:46:00 Author:May

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Adjustable_dc_dc_step_down_converter_2A

Published:2009/7/25 1:23:00 Author:Jessie

This circuit is similar to that of Fig．4-7,except that this circuit can be operated with inputs of 15 to 25 V.   (View)

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Adjustable_dc_dc_step_down_converter5A

Published:2009/7/25 1:22:00 Author:Jessie

This circuit is similar to that of Fig.4-11,except that this circuit can be operated with inputs of 17.7 to 22.3V.   (View)

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DIFFERENTIAL_TEMPERATURE_SENSOR

Published:2009/6/29 1:44:00 Author:May

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dc_dc_step_down_converters

Published:2009/7/25 1:21:00 Author:Jessie

This circuit shows a dc/dc converter with adjustable output.Figure4－16B shows the values of Cin，Cout、andL required for Various input and output voltages，The part numbers required for various output-current limits are given in Figs．4-7 through 4-14，For example, use LAS-6320/6420 for currents up to 2 A、LAS-6330/6430 for currents up to 3 A,LAS-6350/6450 for currents up to 5 A、and LAS-6380/6480 for currents up to 8 A． Figure 4-16C shows information on component sources．   (View)

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SIMPLE_DIFFERNTIAL_TEMPERATURE_SENSOR

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

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dc_dc_step_down_microconverters

Published:2009/7/25 1:19:00 Author:Jessie

The LSH components require only two capacitors and a choke to form a dc/dc step-down converter. Figure 4-15B shows the values of Cin, Cout, and L required for various input and output voltages. The part numbers required for various output-current limits are given in Figs. 4-3 through 4-6. For example, use LSH-6325 for currents up to 2A, LSH-6335/6435 for currents up to 3 A, LSH-6355/ 6455 for currents up to 5 A, and LSH-6389/6489 for currents up to 8 A. Figure 4-16C shows information on component sources.   (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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Adjustable_dc_dc_step_up_converter_25_A

Published:2009/7/25 1:17:00 Author:Jessie

This circuit shows an LAS-6380／6480 used as a step-up converter with an adjustable output.   (View)

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