http://www.elecfree.com/electronic/pocket-headphone-amplifier-by-opa134/ Fri, 21 Nov 2008 22:54:43 +0000 http://wordpress.org/?v=2.5.1 http://www.elecfree.com/electronic/pocket-headphone-amplifier-by-opa134/#comment-942 Pocket Headphone Amplifier by OPA134 | วงจร โครงงาน อิเล็กทรอนิกส์ Wed, 17 Sep 2008 02:29:57 +0000 http://www.elecfree.com/electronic/pocket-headphone-amplifier-by-opa134/#comment-942 [...] The OPA134 is wired as a non-inverting amp with a gain of 11. At this gain, the output impedance of the amplifier is less than 0.2 ohms throughout the audio range. The high-pass filter C1-R2 at the input blocks DC current and has a corner frequency of about 15Hz. Substituting a 1uF capacitor will lower the corner frequency to 1.5Hz. … วงจรแอมป์หูฟัง ด้วยไอซีออบแอมป์ น่าสนใจดี อ่านต่อ [...] [...] The OPA134 is wired as a non-inverting amp with a gain of 11. At this gain, the output impedance of the amplifier is less than 0.2 ohms throughout the audio range. The high-pass filter C1-R2 at the input blocks DC current and has a corner frequency of about 15Hz. Substituting a 1uF capacitor will lower the corner frequency to 1.5Hz. … วงจรแอมป์หูฟัง ด้วยไอซีออบแอมป์ น่าสนใจดี อ่านต่อ [...]

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