3 V/5 V Low Power Synchronous Voltage-to-Frequency Converter


Posted on Feb 5, 2014

The ADF4107 Frequency Synthesizer CAN be used to implemen local Oscillators in the upconversion and downconversion sections of Wireless receivers and transmitters. It consists of a low noise digital PFD (phase frequency detector), a precision Charge Pump programmable reference divider, programmable A and B Counters and a dual-modulus prescaler (P/


3 V/5 V Low Power Synchronous Voltage-to-Frequency Converter
Click here to download the full size of the above Circuit.

P + 1). The A (6-bit) and B (13-bit) Counters in conjunction with the dual-modulus prescaler (P/P + 1), implement an N divider (N = BP + A). In addition, the 14-bit reference Counter (R counter), allows selectable REFIN frequencies at the PFD input. A complete PLL (phase-locked loop) CAN be implemented if the synthesizer is used with an external loop Filter and VCO (voltage controlled oscillator). Its very high bandwidth means that frequency doublers CAN be eliminated in many high frequency systems, simplifying system architecture and reducing cost. By Analog Devices, Inc.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Solar Engine
    EPROM adapter for ATMEL Programmer
    Dual Audio Amplifier Power Supply Circuit
    40M Cw Transmitter Circuit
    ac-motor-control-circuits
    Current Sensor Board
    ADT70 platinum resistance temperature measurement circuit



    Top