Published:2009/7/23 20:15:00 Author:Jessie | From:SeekIC
The 2N4391 provides a low RDS(ON) (less than 30Ω). The tee attenuator provides for optimum dynamic linear range for attenuation. If complete turnoff is desired, attenuation of greater than 100 dB can be obtained at 10 MHz, provided that proper RF-construction techniques are used (proper shielding to prevent input passing to output around the FETs).
Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Amplifier_Circuit/Voltage_controlled_variable_gain_video_amplifier.html
Print this Page | Comments | Reading(3)
Code: