Position: Index > Led Circuit >

Voltage Controlled Variable Gain Amplifier

2014-12-21 14:34  
Declaration:We aim to transmit more information by carrying articles . We will delete it soon, if we are involved in the problems of article content ,copyright or other problems.
This is a circuit of voltage controlled variable gain amplifier. This circuit uses 2N4391 that will provide a low Rds(on) less than 30 Ohm. This circuit also uses a tee attenuator, that will provide optimum dynamic linear range for attenuation. We can obtain the attenuation greater than 100dB at 10MHz by providing proper RF construction techniques. Here is the circuit :

Voltage Controlled Variable Gain Amplifier circuit schematic

[Source: National Semiconductor Application Note]

Reprinted Url Of This Article: