Circuit Diagram

500_MHz_OSCILLATOR

Published:2009/6/29 4:33:00 Author:May

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Silicon Controlled Trigger Circuit

Published:2011/7/21 9:08:00 Author:Joyce | Keyword: Silicon Controlled, Trigger

As shown in the figure, 555, R1, RP1, C2 and some other components constitute the trigger delay circuit. Commonly, 555 is in the state of reset , and feet 3 displays a low level since R1 is connected with VDD; When triggered signals come in , SCR will break over ,feet 2 will have a low level signal which will turn 555 to output a high level. The temporary stable width is: τ = 1.1 RP1C2 . After triggering, SCR will shut off. This circuit can lower the requirement of triggering pulse. If CMOS type 555 (or 556) is used, the triggering current can also be reduced.   (View)

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FIVE_POLE_ACTIVE_FILTER

Published:2009/6/29 4:30:00 Author:May

The above realization of a type D3 receive filter is accompished using eight OP-08's. As can be seen from 1he response curve the >30dB attenuation in the stop band re-qu jrement has been met. In addition, thenoise performance of <0dBHn has been measured. One of the unique features of the OP-08 is ils low supply current of 600μA maximum Thus the total supply dralrl for all eight op amps is only 4.8mA.   (View)

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VOM_FIELD_STRENGTH_METER

Published:2009/6/29 4:26:00 Author:May

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450_MHz_COMMON_SOURCE_AMPLIFIER

Published:2009/6/29 4:26:00 Author:May

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High Frequency Thyristor Trigger Circuit

Published:2011/7/21 9:16:00 Author:Joyce | Keyword: High Frequency , Thyristor , Trigger

As shown in the figure, 555 ,RP1, R2, C1 constitute the astable multivibrator.The oscillation frequency and duty ratio can be altered by adjusting RP1. The output pulse will trigger the flip-flop composed of VT1 and VT2. V01, V02 can trigger two thyristors alternatively .   (View)

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200_MHz_NEUTRALIZED_COMMON_SOURCE_AMPLIFIER

Published:2009/6/29 4:26:00 Author:May

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TUNED_FIELD_STRENGTH_METER

Published:2009/6/29 4:25:00 Author:May

Circuit NotesResonant combination of L1 and C1 selected to cover frequencies desired.   (View)

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80_MHz_CASCODE_AMPLIFIER

Published:2009/6/29 4:25:00 Author:May

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TWO_METER_AMPLIFIER5_W_OUTPUT

Published:2009/6/29 4:24:00 Author:May

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UNTUNED_FIELD_STRENGTH_METER

Published:2009/6/29 4:24:00 Author:May

Circuit Notes Sensitivity is controlled by R1 and sen-sitivity of Meter M1.   (View)

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30_MHz_AMPLIFIER_POWER_GAIN=50_dBBW≈10_MHz

Published:2009/6/29 4:23:00 Author:May

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60_MHz_AMPLIFIER

Published:2009/6/29 4:23:00 Author:May

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TRANSISTORIZED_Q_MULTIPLIER_FOR_USE_WITH_IFS_IN_THE_1400_kHz_RANGE

Published:2009/6/29 4:21:00 Author:May

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UHF_AMPLIFIER_WITH_INVERTING_GAIN_OF_2_AND_LAG_LEAD_COMPENSATIONGAIN_BANDWIDTH_PRODUCT_350_MHz

Published:2009/6/29 4:20:00 Author:May

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ULTRA_HIGH_FREQUENCY_AMPLIFIER

Published:2009/6/29 4:19:00 Author:May

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100_MHz_AND_400_MHz_NEUTRALIZED_COMMON_SOURCE_AMPLIFIER

Published:2009/6/29 4:18:00 Author:May

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135_175_MHz_AMPLIFIER

Published:2009/6/29 4:16:00 Author:May

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200_MHz_CASCODE_AMPLIFIER

Published:2009/6/29 4:15:00 Author:May

This 200 MHz JFET cascode circuit features low cross-modulation, large signal handling ability, no neutralization, and AGO controlled by biasing the upper cascade JFET. The only special requirement of this circuit is that bss of the upper unit must be greater than that of the lower unit.   (View)

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800Hz Signal Generator Circuit

Published:2011/7/20 23:42:00 Author:Joyce | Keyword: 800Hz , Signal Generator

The oscillation stage of this 800 Hz signal generator is a transformer coupling LC oscillating circuit, which is simple and has a stable frequency. Control amplifier is used as buffer amplifier to reduce distortion, and potentiometer can be used to adjust the output level. 1. The technical index (1)operating frequency : 800 Hz ; (2) frequency stability:≤士 20 Hz ; (3) output level: 0 dB / 600 Ω. 2. Working principle is as shown in the figure. The 800 Hz signal generator is composed of LC oscillation stage and buffer amplifier stage. Oscillation stage: The tuned transformer T1 is used as LC oscillation tank circuit and output transformer, and C2 is a tuned capacitor.   (View)

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