Rongge

Series 150W Amplifier With Active Crossover Series 150W Amplifier with Active Crossover is very interesting. Actually, this circuit uses 4-channel power amplifier chip. Well, as an Active Crossover here we use also a chip that can separate the tone of the bass, midrange and treble, the output from the Active Crossover can be directly amplified by power amplifier. Power Chip 4-channel amplifier that we use is SANYO LA47536 who have power outputs up to 150W, while for Active Crossover (Active Crossover) we use the LF353 from National Semiconductor.

Active AM Radio Antenna Amplifier / Preamplifier Circuit The antenna amplifier circuit has a part count of about 40, using the following active parts: 2 NPN transistors (BC548's), 1 MOSFET (BF981), 2 Varicap diodes (KV1235), as well as a 6v2 zener-diode. there is and a 330uH (micro Henry) inductor / coil, which can be modified for operation on other frequency bands. Designed to work with a telescopic whip antenna, the amplifier circuit operates in the typical AM / MediumWave band of 550 - 1650 kHz (kilohertz), with a power requirement of 12 Volts DC. The circuit also has a gain control feature, so weather signals can be amplifier more, if need be. This amplification alteration is provided via, RV1 The amplifier circuit's output impedance is 50 Ohms, which is the standard for all of radio receivers, so it ought to work well along with your AM receiver. Notes This circuit is designed to amplify the input from a telescopic whip antenna. The preamplifier is designed to cover t...

This active audio audio system use three TDA2052 chips and 5 speakers ( one woofer, two tweeters and two midranges ). For this TDA2052 active audio system we need dual 20 volts power supply and five volts supply for the stand by function.To the input of the every audio IC chip is placed an audio filter for filtering the audio signal for used speakers ( low pass for woofer , high pass for midranges and tweeters) The subwoofer plays the 20 to 300 Hz frequency range, while the remaining 300 Hz to 20KHz are sent to two separate channels with stereo effect.If one of the amplifier is affected by clipping distortion the others amplifiers are not affected .

Simple Active Crossover Circuit Diagram with TL074 . An audio source, like a mixer, preamp, EQ, or a recorder, is fed to the input of the Electronic Crossover Circuit. This signal is either AC or coupling, depending on the setting of switch 51, the non-inverting input of buffer amplifier Ul-a, a section of a quad BIFET, low amp TL074 noise made by Texas Instruments op.  This stage has a gain of 2, and its output is distributed to both a low pass filter made by R4, R5, C2, C3, and Uld op-amp, and a high-pass filter made by R6, R7, C4, C5, and op amp ULC. These are12 dB / octave Butter worth filters. The response of the Butter worth filter was chosen because it gives the best compromise between the damping and phase.   Active Crossover Circuit Diagram with TL074 The values of capacitors and resistors varies depending on the selected connection that your device works. The filter outputs are fed to a balancing network made by R8, R9, RIO, R14 and potentiometer RLL balance. Wh...