Patent ID: 6104119
Filing Date: 2000-08-15
Classification: H03K,H04B

Abstract:
A two-way radio having a piezoelectric push-to-talk (PTT) switch, comprising:a transmitter, a receiver and an antenna coupled together;a piezoelectric push-to-talk (PTT) switch coupled to the transmitter, said PTT switch comprising:a rigid sheet having upper and lower major surfaces and having an actuation portion;a first piezoelectric film disposed on the upper surface and a second piezoelectric film disposed on the lower surface to form a laminated structure;a first electrically conductive area on the first piezoelectric film and a second electrically conductive area on the second piezoelectric film, each of the electrically conductive areas overlying the actuation portion; andsaid laminated structure and first and second electrically conductive areas co-operating when the actuation portion is sufficiently deformed to cause the first and second piezoelectric films to each generate electric signals that are sent through the first and second electrically conductive areas; andsaid generated electric signals causing said transmitter to transmit a radio signal through said antenna.