power supply and landlines of digital circuit

Published:2011/6/27 21:07:00 Author:chopper | Keyword: power supply, landlines, digital circuit | From:SeekIC

As to digital circuit,the impedance of power supply should be low as possible as we can.The high impedance will effect the circuit.The picture is a connection method of double-sided printed circuit board.On the element installation surface there are horizontal and longitudinal leads,and leads should be short and thick as possible as we can.Additionally,the leads are in grid shape to reduce the circuit impedance when the frequency is high.The waxy capacitance of power supply can reduce the high frequency impedance of leads of power supply.Thus,every IC is connected with a 0.1μF ceramic capacitor.To reduce the low frequency impedance of leads of power supply,we can add a 100μF electrolytic capacitor to the input end of power supply.



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