Real-time, in-situ saw filter delay adjustment

Details Real-time, in-situ saw filter delay adjustment Real-time, in-situ saw filter delay adjustment

1990-08-15

1992-05-05

Laroche, Eugene R.

Wave transmission lines and networks

Coupling networks

Delay lines including elastic surface wave propagation means

333153, 310313D, 29 2525, H03H 942, H03H 968

Patent

active

051111683

ABSTRACT:
A method of adjusting the center frequency of a SAW device by providing a substrate capable of propagating a surface acoustic wave thereon having input transducer electrode on one end portion thereof, output transducer electrodes on the opposite end portion thereof and a waveguide portion therebetween, applying an RF input signal to the input transducer and providing an indication of the output obtained from the output transducer and etching the entire device with an etchant until the indication has reached a predetermined status. According to a second embodiment, the delay of a SAW device is adjusted by providing a substrate capable of propagating a surface acoustic wave thereon having an input transducer portion on one end portion thereof, an output transducer portion on the opposite end portion thereof and a waveguide portion therebetween, masking the input and output transducer portions and providing an exposed area over the waveguide portion, applying an RF input signal to the input transducer and providing an indication of the output obtained from the output transducer and etching the pattern in the unmasked poriton of the waveguide with an etchant until the indication has reached a predetermined status.

REFERENCES:
patent: 4097825 (1978-06-01), Gerard
patent: 4130813 (1978-12-01), Sandy et al.
patent: 4364016 (1982-12-01), Tanski
patent: 4442574 (1984-04-01), Wanuga et al.
patent: 4598224 (1986-07-01), Ballato
patent: 4634914 (1987-01-01), Ballato

Affiliated with

Also associated with

Rating

Real-time, in-situ saw filter delay adjustment does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Real-time, in-situ saw filter delay adjustment, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Real-time, in-situ saw filter delay adjustment will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1415652