MONOLITHIC CRYSTAL BANDPASS FILTER
Original Publication Date: 1980-Aug-01
Included in the Prior Art Database: 2001-Oct-10
Crystal filters with tighty controlled parameters are needed for SSB radios and telephone carrier modems. Theoretically, the desired response characteristics can be otained most efficiently with elliptic function type filters. However, in the past it has been difficult to achieve a practical realization of this type design using conventional two-pole monolithic crystals. By utilizing the design technique described hereinbelow, a filter with the desired response characteristics can be obtained by cascading conven- tional two-pole monolithic crystals.