陶瓷滤波器

'1. THIS SPECIFICATION SHALL COVER THE CHARACTERISTICS OF CERAMIC FILTER WITH 455KHz,INTENED FOR USE IN TRANSCEIVERS,ETC.2. PART NUMBER :LT455J-13. ELECTRONICAL SPECIFICATIONSA. CENTRE FREQUENCY (f。) : 455KHz±1.0KHz. MAX.B. BAND WIDTH AT 6 dB : ±1.7KHzMIN.(TO 455KHz)C. BAND WIDTH AT 50 dB : ±4.8KHz MAX.(TO 455KHz)D. STOP BAND ATTENUATION : 50 dB MIN.(AT f。±100KHz)E. RIPPLE : 2.0 dB MAX.(AT f。±5.0KHz)F. INSERTION LOSS : 8.0 dB MAX (AT THE SMALLEST LOSS)G. TEMPRATURE COEFFICIENTOF CENTER FRENQUENCY : ±50PPM/℃Max.(-20 TO +80℃)H. INPUT/OUTPUT IMPEDANCE : 2.0 KWNOTE : A) CENTER FREQUENCY SHALL BE DEFIED AS THE CENTRAL

VALUE OF THE BAND WITH AT 6 dB

B) TEMPRATURE COEFFICIENT OF CENTER FREQUENCY

SHALL BE DEFINED AS THE AVERAGE OF THE CENTRAL

FREQUECY.

4. MEASUREMENTA. ENVIRONMENTAL CONDITIONMEASUREMENT SHALL BE CARRIED OUT AT THE REFERENCE TEMPERATURE OF 25℃ ±2℃. IT SHALL BE POSSIBLY DONE AT 5℃TO 35℃UNLESS IT IS QUESTIONABLE.

B. MEASURING CIRCUIT

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