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Index 1348

PIN_DIODE_SWITCH

Published:2009/6/24 3:16:00 Author:Jessie

PIN_DIODE_SWITCH
This PIN diode switch uses RF chokes and a single diode。R1 is typically 470Ω to 2.2kΩ (View)

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SCR_MOTOR_SPEED_CONTROL

Published:2009/6/24 3:16:00 Author:Jessie

SCR_MOTOR_SPEED_CONTROL
An SCR is used in a phase-control type application to supply a variable pulsating dc voltage to a motor. (View)

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4_W_BRIDGE_AMPLIFIER

Published:2009/6/24 3:15:00 Author:Jessie

4_W_BRIDGE_AMPLIFIER
(View)

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DIGITALLY_CONTROLLED_ONE_OF_FOUR_ANALOG_SWITCH

Published:2009/6/24 3:15:00 Author:Jessie

DIGITALLY_CONTROLLED_ONE_OF_FOUR_ANALOG_SWITCH
(View)

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HIGH_GBW_OP_AMP

Published:2009/6/24 3:15:00 Author:Jessie

HIGH_GBW_OP_AMP
You can build a composite amplifier featuring high gain, wide bandwidth, and good dc accuracy by cascading the sections of a dual video amplifier and adding two appropriate phase-compensation components. The op amp drives a 150-Ω load and provides a closed-loop gain of 40 dB. (View)

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BASIC_ZERO_CROSSING_SWITCH_CIRCUIT

Published:2009/6/24 3:10:00 Author:May

BASIC_ZERO_CROSSING_SWITCH_CIRCUIT
Here is the schematic of a solid-state ac relay with zero-crossing. The triac permits the relay to switch to ac directly. (View)

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INVERTING_POWER_AMPLIFIER

Published:2009/6/24 3:14:00 Author:Jessie

INVERTING_POWER_AMPLIFIER
(View)

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OSCILLATOR_TRIGGERED_SWITCH

Published:2009/6/24 3:09:00 Author:May

OSCILLATOR_TRIGGERED_SWITCH
In this circuit (the oscillator-triggered switch), the generated by an astable oscillator. (View)

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RESISTOR_PIN_DIODE_SWITCH

Published:2009/6/24 3:13:00 Author:Jessie

RESISTOR_PIN_DIODE_SWITCH
This circuit uses resistors instead of RE chokes to keep costs low. The values of R1 and R2 should be no lower than about 1 kΩ to minimize loss. (View)

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OP_AMP_AND_ANALOG_SWITCH_RON_COMPENSATOR

Published:2009/6/24 3:08:00 Author:May

OP_AMP_AND_ANALOG_SWITCH_RON_COMPENSATOR
This switch is in series with feedback resistor to compensate gain. (View)

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LOW_OUTPUT_IMPEDANCE_MULTIPLEXER

Published:2009/6/24 3:08:00 Author:May

LOW_OUTPUT_IMPEDANCE_MULTIPLEXER
Both inputs are terminated in their characteristic impedance; 75Ω is typical for video applications. Because the output cables usually are terminated in their characteristic impedance, the gain is 0.5. Consequently, amplifiers U2A and U2B are configured in a gain of +2 to set the circuit gain at 1.R2 and R3 determine the amplifier gain; if a different gain is desired, R2 should be changed according to the equation G = (1 + R3/R2) R5, LCL1, and D1 make up an asymmetrical charge/discharge time circuit that configures U1 as a break-before-make switch to prevent both amplifiers from being ac-tive simultaneously. The multiplexer transition time is approximately 15μs with the component values shown. (View)

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125_MHz_LOGIC_PROBE

Published:2009/6/24 3:06:00 Author:May

125_MHz_LOGIC_PROBE
This logic probe features either high-low (LED) indication or latching operation. When S1 closed, the indication of a pulse is latched and the red LED1 stays on. Piezoelectric buzzer BZ1 used as a beeper to sound that a logic high is preset. (View)