Method and apparatus for controlling the wakeup logic of a radio

Details Method and apparatus for controlling the wakeup logic of a radio Method and apparatus for controlling the wakeup logic of a radio

1995-08-11

1998-12-01

Urban, Edward F.

Telecommunications

Receiver or analog modulated signal frequency converter

With particular receiver circuit

455 383, 370311, H04B 116

Patent

active

058452044

ABSTRACT:
A low-power stop mode "snooze" timer is implemented in the processing unit of a communication system, which runs without the use of the usual crystal-controlled oscillator. The "snooze" timer is implemented by a second oscillator with associated timer circuit. The second oscillator runs continually and feeds a timer which is loaded with a suitable value. The timer, when timed out or expired, will reactivate the main processing functions, thus allowing the successful reception of an external signal from a remote transmission source. To compensate for the inaccuracy of the second oscillator due to its dependence upon voltage, process and temperature, the snooze timer's output is calibrated during the wake-up periods against a timing signal derived from the internal crystal-controlled timing source. This calibration compensates for the inherent frequency instability of the second oscillator and allows a timing signal of sufficient accuracy to be maintained over the stop cycle.

REFERENCES:
patent: 5058203 (1991-10-01), Inagami
patent: 5142699 (1992-08-01), Sato et al.
patent: 5280650 (1994-01-01), Sobti
patent: 5283568 (1994-02-01), Asai
patent: 5428820 (1995-06-01), Okada et al.
patent: 5448755 (1995-09-01), Tanaka

Affiliated with

Also associated with

Rating

Method and apparatus for controlling the wakeup logic of a radio does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for controlling the wakeup logic of a radio, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for controlling the wakeup logic of a radio will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2403106