2306 2307 General Description 2306, 2307 high speed CMOS especial
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Frequency Synthesizer
2306 2307
General Description 2306, 2307 high speed CMOS especially designed battery-powered radio equipment mobile telephones. intended application will GSM, PCN, DECT other digital mobile systems. wide range dividing ratios also allows application analog systems. circuit consists reference-, N-counter, dual-modulus-control logic, phase detector with charge pump serial control logic. setting operating mode selection counter ratios done serially ports CLK, operating modes allow selection single dual operation, asynchronous synchronous data acquisition, different antibacklash-impulse times, different PD-output current modes, polarity setting PD-output signal, adjustment trigger-edge MOD-output signal, standby modes control multifunction outputs MFO1 MFO2. reference frequency applied input scaled down R-counter. maximum value MHz. frequency applied input scaled down N/A-counter according single dual-mode operation. maximum value single-, dual-mode operation. phase detector frequency phase sensitive. produces phase detector signal with adjustable antibacklash impulses order prevent dead zone very small phase deviations. Phase differences smaller than therefore resolved. Programming done serial data control. contents messages assigned functional units according destination address. Single dual-mode operation well asynchronous synchronous data acquisition status should therefore precede programming counters. 2306/PMB 2307 offer possibility synchronous data acquisition avoid error signals phase detector non-corresponding dividing factors counters produced asynchronous loading. Synchronous programming guarantees control during changes frequency channel. That means that state phase detector phase difference kept maintained, case "lock in", control process starts with phase difference "zero". Synchronous transmission particularly advantageous when large transfers channel made specific short transient recovery time. this purpose larger reference frequency switched order achieve rapid"rough"-transient response, increasing bandwidth loop time. When reaching "quasi lock-in" state, reference frequency switched back original values.
Type 2306-T 2306-R 2307-R
Package P-DSO-14-1 (SMD) P-TSSOP-16-1 (Shrink, SMD) P-TSSOP-16-1 (Shrink, SMD)
Adjustment "actual" value then takes place with usual transient response small transfers channel. synchronous transmission ensures that additional phase errors arise change reference frequencies. 2306/2307 standby modes (standby1, reduce current consumption. Standby1 switches whole circuit, current consumption reduced below Standby2 switches counters, charge pump outputs, only preamplifiers stay active. standby modes affect port output signal. influence other output signals standby table. Features operating current consumption operating voltage 2306: 2307: High input sensitivity, high input frequencies (220 MHz) Extremely fast phase detector without dead zone Linearization phase detector output current sources Synchronous programming counters (N-, N/A-, R-counters) system parameters Fast modulus switchover 65-MHz operation Switchable modulus trigger edge Large dividing ratios small channel spacing A-scaler N-scaler 16380 R-scaler 65535 Serial control (3-wire bus: data, clock, enable) fast programming (fmax MHz) Switchable polarity rate trimming rise phase detector multifunction outputs Digital phase detector output signals (e.g. external charge pump) frn, outputs N-scalers Port output (e.g. standby prescaler) External current setting output Lock detect output with gated antibacklash pulse (quasi digital lock detect)
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Frequency Synthesizer
2306 2307
R-Counter Data Register
PhaseDetector
LockDetector
Shadow Register MFO1
Shift Register
Charge Pump
MFO2
Modulus-Control
N-Counter
A-Counter
Data Register Shadow Register
Data Register Shadow Register
Shift Register
Shift Register
Serial Control Logic
ITB04206
Block Diagram
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