Pretty much right on the money... The cmos 4016 and its 4066 sister chip are/were often used as audio gates and switches in various projects. As with all things there are various pros and cons to using them but they are easy and cheap enough if you obey the rules for operation in linear circuits (regarding ac coupling, bias resistors and logic control). It's common to find two or more switch sections of the chip used in series for improved isolation. Another cute trick was to use the 4053 switch chip to simply ground the signal during mute conditions. The classic ACC RC-85 Repeater Controller is a great circuit to reference for a practical way to switch audio around using the 4053.
The 5532 is a very popular amplifier chip with enough power capacity to make a very nice line driver. Easy to step up as an unbalanced (single ended) or balanced audio output circuit. Low noise and power gain on the relative scale of this type of chip. Looks like you have someones home-brew version of a classic gated audio line driver board/circuit. The question is... is it worth it to use as-is or do you rebuild it? cheers, s. > "Eric Lemmon" <[EMAIL PROTECTED]> wrote: > Randy, > The CD4016AE is a quad bilateral CMOS switch, and the RC5532N > is a dual low-noise op amp. Without knowing how the two ICs > are wired, it's difficult to identify the purpose of the device. > It is probably an audio amplifier, and the CMOS switch might be > used for gain or frequency response adjustment, muting, or > possibly input or output selection. > >> -----Original Message----- >> [mailto:[EMAIL PROTECTED] On Behalf Of Randy >> Can anyone tell by looking at the Picture I up-loaded >> to Photos-Miscellaneous-What is this By looking at the >> Picture. >> Thanks Randy
