Wideband RF Amplifier

Posted on Feb 6, 2014

This is a circuit of Wideband RF amplifiers. This circuit use current-feedback components like the THS3202. The THS3202 was chosen because it has fast slew rate and wide bandwidth. The amplifier voltage gain of this circuit is 20 and stage voltage gain of this circuit is 10. Here is the circuit: Compared to traditional RF circuitry, this circuit i

Wideband RF Amplifier
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s simpler. This circuit just require two resistors, op amp, decoupling components and the termination. the stage gain is set by The 301-O (RF) and 16. 5-O (RG). [Source: Texas Instruments Application Note] The basis of an audio mixer is an inverting summing circuit below. For real audio mixers, a single-supply voltage is seldom used. To increase dynamic range, the designer will often push an op amp up to, and sometimes beyond it`s Continue reading †’. Not only a summing circuits, but there are also subtracting circuits. Here`s the circuit diagram: Subtracting circuit is a common application which is used to eliminate the vocal track (recorded at equal levels in both channels) from stereo recordings. R1 Continue reading †’. This is a Single Op-Amp Twin-T Band-Pass and Notch Filter circuit. This circuit uses the twin-T topology which requires one or two op amps and three resistors and three capacitors. That`s mean this topology based on a passive (RC) topology. Continue reading †’. Generation of a virtual ground is required by single-supply operation. It`s usually required at a voltage equal to Vcc/2. We can use a simple voltage divider produce Vcc/2, but it`s performance deteriorates at low frequency. The values of R1 and Continue reading †’. The figure below show an operational amplifier circuit. Closed-loop gain given by this circuit is R2/R1 when this ratio is small compared with the amplifier open-loop gain, and it`s...

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