Piezoelectric signaling device

Details Piezoelectric signaling device Piezoelectric signaling device

1986-12-10

1990-06-19

Jordan, Charles T.

Communications, electrical: acoustic wave systems and devices

Signal transducers

310316, 310317, 367157, H04R 1700

Patent

active

049359096

ABSTRACT:
A piezoelectric signaling device has an oscillator circuit which includes a transistor amplifier and a piezoelectric transducer. There is a Zener diode in the transistor circuit. The Zener voltage of the diode determines the start-up voltage of the device. By choosing diodes with different Zener voltages, the start-up voltage may be preselected. In other embodiments, the diode may be connected in the base circuit of the transistor or in other portions of the oscillator circuit.

REFERENCES:
patent: 3742492 (1973-06-01), Proctor
patent: 4277824 (1981-07-01), Alberkrack
patent: 4393373 (1983-07-01), Torii et al.
patent: 4520289 (1985-05-01), Sato et al.
patent: 4529845 (1985-07-01), Boeckmann
patent: 4587958 (1986-05-01), Noguchi et al.

Affiliated with

Also associated with

Rating

Piezoelectric signaling device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Piezoelectric signaling device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Piezoelectric signaling device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2264420