Charge storage and monitoring apparatus utilizing acoustic waves
Elastic wave detector
Electronically variable surface acoustic wave phase shifter
Monolithic surface acoustic wave signal storage device
ApplicationNo. 06/515846 filed on 07/21/1983
US Classes:257/222, Responsive to non-electrical external signal (e.g., imager)257/249, Electrode structures or materials257/416Acoustic wave
ExaminersPrimary: Larkins, William D.
Assistant: Mintel, William
Attorney, Agent or Firm
International ClassesH03H 9/00 (20060101)
H03H 9/42 (20060101)
H03H 11/26 (20060101)
H03H 9/02 (20060101)
AbstractThe disclosure is directed to a method and a device for delaying an electrical signal, the method and device being useable in various signal processing applications. A buried channel is formed by disposing a portion of a layer of piezoelectric semiconductor material between confining layers. A surface acoustic wave is established in the piezoelectric semiconductor material. Majority carriers are depleted from the channel, and an electrical signal is injected into the channel. A delayed version of the electrical signal, which had been carried along by the surface acoustic wave, can then be extracted from the channel.