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PT2256-S Datasheet(PDF) 4 Page - Princeton Technology Corp |
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PT2256-S Datasheet(HTML) 4 Page - Princeton Technology Corp |
4 / 4 page Electronic Volume Controller IC PT2256 Princeton Technology Corp. Tel : 886-2-29162151 Fax: 886-2-29174598 URL: http://www.princeton.com.tw PT2256 v1.3 4 Updated Sept. 2000 APPLICATION CIRCUIT (Including Loudness but No Backup Circuit) L-C h O utput R-Ch O utpu t R -Ch Input L-C h Inp ut Rx Cx 8.2nF 8.2nF 820 O h m s 820 O h m s 820 O h m s 820 O h m s 820 O h m s 100 Note: Modifying the values of Rx and Cx affects the Oscillator Frequency of the IC. If the Fosc value is big, then the volume control change is fast. Likewise, if the Fosc value is small, the volume control change is slow. It is suggested that Rx= 33K, Cx = 2.2uF. The table for the Rx, Cx and Fosc values are given below. x Rx Cc s o Fx Rx Cc s o F K 3 3F u 0 . 1z H 1 . 4 3K 3 3F u 0 . 1z H 1 . 4 3 K 3 3F u 2 . 2z H 8 . 7 1K 1 5F u 0 . 1z H 7 . 2 2 K 3 3F u 0 1z H 4 . 3K 0 0 1F u 0 . 1z H 8 . 1 1 |
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