TSF1542D50-S9 TOKEN [Token Electronics Industry Co., Ltd.], TSF1542D50-S9 Datasheet - Page 13

• Manufacturer Part Number: TSF1542D50-S9
• Description: Front End Filters
• Manufacturer: TOKEN [Token Electronics Industry Co., Ltd.]

Version 2010
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RF & IF Filter Applications
RF Filters (front end)
- The main key factor of insertion loss on system performance criticizes the application of resonant
- A combination of two port resonators can be described as an LCRF design. Typically, a parallel
- IEF composes the basic design principle for RF filters with one port resonators used as impedance
- For wide-band, low-loss filters, Token takes advantage of different cuts of higher coupling substate
IF Filters
- There are various different design principles which are suitable for the design of IF SAW Filters.
- Precision filter design meets most of the requirements such as phase ripple, group delay and low
- SPUDT (Single Phase Unidirectional Transducer) filters combine transversal and resonant filter
- Token utilizes SFIT (Slanted Finger Interdigital Transducer) filter to provide a low insertion loss
design principles such as LCRF (Longitudinally-Coupled Resonator Filter), IEF (Impedance
ElementFilter), and IEF balanced bridge filters. With many year’s experience in SAW applications,
Token takes advantages of these design principles for the development of low loss filters for front
end applications.
connection of 4 two port resonators is used. This advantage allows very low loss by reducing resistive
losses and avoided waveguide effects.
elements. Resonators are constituted in a ladder configuration. The difference between the acoustic
impedance of resonance and anti-resonance is used to achieved a filter performance. The resonators
may be designed to have different resonant frequencies.
material (LiNbO3 / LiTaO3).- TO-220 Style Power Package, Isolated Case, Non Inductive.
However, to meet the requirements perfectly is working on optimization.
amplitude in combination with high close-in rejection and fabulous selectivity. The disadvantage
of precision filters is their high insertion loss. Token SAW Resonator design makes low insertion
loss and miniaturized package size served better.
design principles to take advantage of optimization both. By optimizing the transduction and
reflection of interdigital transducers, the filter performance can be improved while keeping the
chip size the same. As a result of internal reflections, the signal length in the time domain is increased.
with a wide bandwith in SAW design. Token has developed a set of practical design tools to achieve
low group delay ripple, and suppression of reflections including the triple transit signal.
http://www.token.com.tw/
RF & IF Filter Applications
rfq token.com.tw
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