lc72134m Sanyo Semiconductor Corporation, lc72134m Datasheet - Page 18

• Manufacturer Part Number: lc72134m
• Description: Dual Pll Frequency Synthesizer For Fm Tuner Systems
• Manufacturer: Sanyo Semiconductor Corporation

Structure of the Sub PLL Programmable Divider
Sample Sub PLL Programmable Divider Divisor Calculations
• For FM with a step size of 100 kHz (SDVS = 1: FMINb operating)
• For FM with a step size of 50 kHz (SDVS = 1: FMINb operating)
FM RF = 90.0 MHz (IF = –10.7 MHz)
FM VCO = 79.3 MHz
Sub PLL fref = 50 kHz (RS0 = 0, RS1 = 0)
79.3 MHz (FM VCO) 50 kHz (fref) 2 (for the FMINb 1/2 prescaler) = 793
FM RF = 90.0 MHz (IF = +10.7 MHz)
FM VCO = 100.7 MHz
Sub PLL fref = 25 kHz (RS0 = 1, RS1 = 0)
100.7 MHz (FM VCO) 25 kHz (fref) 2 (for the FMINb 1/2 prescaler) = 2014
SDVS
1
0
FMINb stopped (pulled down)
FMINb operating
Operating state
272 to 8191
Set divisor
—
Twice the set value
Actual divisor: N
LC72134M
—
Input frequency range
10 to 160 MHz
—
0319 (hexadecimal)
07DE (hexadecimal)
No. 5814-18/27