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ML13145-9P Scheda tecnica(PDF) 6 Page - LANSDALE Semiconductor Inc. |
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ML13145-9P Scheda tecnica(HTML) 6 Page - LANSDALE Semiconductor Inc. |
6 / 17 page www.lansdale.com Page 6 of 17 Issue 0 LANSDALE Semiconductor, Inc. ML13145 PIN FUNCTION DESCRIPTION Pin Symbol/Type Description Description 47 BWadj See Figure 3. COILLESS DETECTOR Bandwidth Adjust The deviation bandwidth of the detector response is determined by the combination of an on–chip capacitor and an external resistor to ground. 2 Fadj Frequency Adjust The free running frequency of the detector oscillator is defined by the combination of an on–chip capacitor and an external resistor, Radj from frequency adjust pin to ground. 1, 48 VEE VEE, Negative Supply These pins are VEE supply for the coilless detector circuit. 3 AFT Out AFT Out The AFT is low pass filtered with a corner frequency below the audio bandwidth allowing the error to be added to the center frequency adjust signal at Fadj, Pin 2. The low frequency high pass corner is set by the external capacitor, Ct from AFT out (Pin 3) to AFT in (Pin 4) and external resistor, Rt from AFT out to Fadj (Pin 2). 4 AFT In AFT In The AFT in is used to set the buffer transfer function. 5 Det Gain Detector Gain The AFT buffer is used to set the buffer transfer function. 6 Det Out Detector Output Set gain and output level of detector with resistor to Det Out Pin. Figure 3. Coilless Detector Internal Circuit Current Amplifier Det Out IF Phase Detector ICO Fadj BWadj A * i A * i 4 AFT In 3 AFT Out 5 6 RI Ct Rt Rf Rb 47 2 2I i 2Ib i VCC Vref2 Vref1 VEE 48, 1 VCC |
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