Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Ladder type piezoelectric filter










Image Number 9 for United States Patent #7619494.

In a ladder-type piezoelectric filter, the attenuation in the stop bands on a low frequency side and a high frequency side are increased while the pass band is widened. The ladder-type piezoelectric filter is made up by alternately connecting parallel arms and series arms. The parallel arms are respectively made up by serially connecting parallel resonators and LC element networks, and the series arms are respectively made up of series resonators. The LC element networks are respectively made up so as to be inductive in resonant frequencies of the serially connected parallel resonators. Further, the LC element networks include capacitors which contribute to formation of a new series resonant point in the stop band on the high frequency side.








 
 
  Recently Added Patents
Control unit including a computing device and a peripheral module which are interconnected via a serial multiwire bus
Pyridylphenyl compounds for inflammation and immune-related uses
Cancer vaccines containing epitopes of oncofetal antigen
Accelerator for a read-channel design and simulation tool
Display apparatus and control method thereof
Semiconductor light-receiving device
Maize variety X00C175
  Randomly Featured Patents
Audio speaker system
Superheterodyne interferometer and method for compensating the refractive index of air using electronic frequency multiplication
Microwave sample-and-hold unit with transistor
Differential M phase-shift modulator
Automatic frequency control (AFC) system and method using an adaptive threshold to improve accuracy of the direct current (DC) component calculation for a received signal
Pedestal lavatory
Diebonding geometry for packaging optoelectronics
Digital transmission apparatus for transmitting asynchronous frames by accomodating them in synchronous frames
Method for generating customer secure card numbers
Valve operation verification system for verifying valve operation of valve disposed in hot gas flow passage