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Two-path Video Amplifier Circuit Composed of MAX457

2016-09-11 16:15  
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Two-path Video Amplifier Circuit Composed of MAX457
Two-path Video Amplifier Circuit Composed of MAX457
As shown in the figure is the high performance video distributor/amplifier circuit composed of MAX457. MAX457 has two units of video amplifier with stable gains,which could drive 75Ω load directly and its - 3dB bandwidth is not less than 70MHz. Its characteristic is small input capacitance (the typical value is 4pF), 100μA input bias current,high isolation between two amplifiers ( the typical value in 5MHz frequency point is 72dB). Changing resistance R1, R2,R4, R5, would alter the output impedance of the amplifier circuit as well ,with the specific data shown as follows.