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> MC145106 pll frequency synthesizer dip
MC145106 pll frequency synthesizer dip
The MC145106 is a phase locked loop (PLL) frequency synthesizer
constructed in CMOS on a single monolithic structure. This synthesizer finds
applications in such areas as CB and FM transceivers. The device contains an
oscillator/amplifier, a 210 or 211 divider chain for the oscillator signal, a
programmable divider chain for the input signal, and a phase detector. The
MC145106 has circuitry for a 10.24 MHz oscillator or may operate with an
external signal. The circuit provides a 5.12 MHz output signal, which can be
used for frequency tripling. A 29 programmable divider divides the input signal
frequency for channel selection. The inputs to the programmable divider are
standard ground to supply binary signals. Pull down resistors on these inputs
normally set these inputs to ground enabling these programmable inputs to be
controlled from a mechanical switch or electronic circuitry.
The phase detector may control a VCO and yields a high level signal when
input frequency is low, and a low level signal when input frequency is high. An
out of lock signal is provided from the on chip lock detector with a 0 level for
