Infrared Wake-Up Circuit

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eric

Posted: Mon Aug 28, 2006 12:22 pm Post subject: Infrared Wake-Up Circuit

Site Admin Joined: 01 Jan 1970 Posts: 311

For all battery-operated devices, regardless of whether they
use disposable or rechargeable batteries, the lower the current
consumption is, the longer the operating time of the
device. For this reason, all functions not needed at the
moment are switched off if possible and only switched on
when needed or by the user. Any circuit containing a receiver
used for remote control or communications is faced with the
problem of current consumption if the circuitry always has to
be active. For instance, the current consumption of typical
photosensor module fitted as an infrared receiver in entertainment
electronics equipment is around 1–2 mA, which
defeats economical battery operation. It is thus necessary to
find a way to circumvent this inconvenience without noticeably
affecting the user.
Using the supplementary circuit described here, the photosensor
module that is actually responsible

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