1. Home /
  2. Repository-circuits /
  3. 150MHz to 170MHz in 25kHz steps using a LMX2306 PLL

150MHz to 170MHz in 25kHz steps using a LMX2306 PLL

Posted on Feb 6, 2014

Using SimPLL`s new PLL Wizard you can design a new PLL with a few clicks of the mouse. We have just designed one that tunes from 150MHz to 170MHz in 25kHz steps using a LMX2306 PLL IC and a MiniCircuits POS300 VCO. and because the LMX2306 and MiniCircuits POS300 are in the libraries, you haven`t had to enter any device data. The PLL has been desig


150MHz to 170MHz in 25kHz steps using a LMX2306 PLL
Click here to download the full size of the above Circuit.

ned with a loop bandwidth of 2. 5kHz and a phase margin of 45degrees. SimPLL predicts the phase noise from the synthesizer. To evaluate which phase detector current setting to use we compared the 250uA setting (red trace) to the 1mA setting (blue trace), both with a loop bandwidth of 2. 5kHz. The difference is due to the larger loop filter resistor in the low current case. Showing the effect of 1nA of DC current at the phase detector. This could be from phase detector leakage, in some cases from loop filter capacitor leakage or VCO varactor diode leakage. Modulation frequency response from modulating the VCO, showing the peaking around the loop bandwidth. Blue trace is with a 45 degree phase margin, red trace has a 60 degree phase margin to reduce peaking. Loop settling is easily observed on the plot of |frequency error|. This shows at a glance that the loop takes about 1. 1ms to lock to within 1kHz and 1. 5ms to lock within 10Hz The VCO phase error is an important parameter in many digital communications systems - here we can see that for the transient plotted above, the VCO takes about 1. 1ms to lock to within 10 degrees of its final phase. SimPLL even provides you with details of the output of the lock detect filter. Shown here in the blue trace is the output from the two time constant analog lock detect filter shown in the schematic, the red trace is the lock detect output using the LMX2306 digital lock detect circuit....




Leave Comment

characters left:

Related Circuits

  • Color sensor
    Color sensor. Colour sensor is an interesting project for hobbyists. The cir- cuit can sense eight colours, i.e. blue, green and red (primary colours); magenta, yellow.
  • Dew sensor
    Dew sensor. Dew (condensed moisture) ad- versely affects the normal per- formance of sensitive electronic devices. A low-cost circuit described here can be used to.
  • Audio Visual Ringer
    Audio Visual Ringer. Many a times one needs an extra telephone ringer in an ad-joining room to know if there is an incoming call. For example, if the telephone is installed in.
  • Multipurpose Circuit for telephone
    Multipurpose Circuit for telephone. This add-on device for telephones can be connected in parallel to the telephone instrument. The circuit provides audio-visual indication of on-hook,.
  • Off line Telephone tester
    Off line Telephone tester. Here is a circuit of an off-line telephone tester which does not require any telephone line for testing a telephone instrument. The circuit is so simple that.
  • Telephone Headgear
    Telephone Headgear. Acompact, inexpensive and low component count telecom head- set can be constructed using two readily available transistors and a few other electronic.
  • Telephone line based audio muting and light on circuit
    Telephone line based audio muting and light on circuit. Very often when enjoying music or watching TV at high audio level, we may not be able to hear a telephone ring and thus miss an important...
  • Telephone Ringer using 556 dual timers
    Telephone Ringer using 556 dual timers. Using modulated rectangular waves of different time periods, The circuit presented here produces ringing tones similar to those produced by a telephone. The.

    • New Circuits

    .

     
    Create NOW your QR MENU for your Restaurant / Hotel / Bar / Caffe,

    Comprehensive ordering/paying features. fully personalized to suit your Business.

    Update Anytime! Easy and Simple!


    Popular Circuits

    Acoustic Sound Receiver
    Acoustic Sound Receiver

    The receiver is an audio amplifier fed by SPKR1, a piezo speaker that is used as a microphone. A...

    VW CAR PASSAT ENGINE CONTROL AND AUTOMATIC SOLENOID ELECTRICAL WIRING CIRCUIT
    VW CAR PASSAT ENGINE CONTROL AND AUTOMATIC SOLENOID ELECTRICAL WIRING CIRCUIT

    1993 VW Passat Engine Control Module, Automatic Control Unit, and Automatic Solenoid Electrical...

    uhf tv pre amplifier
    uhf tv pre amplifier

    This is the another UHF-TV pre-amplifier circuit diagram which simpler than the previous UHF TV...

    simple switch off time delay schematic
    simple switch off time delay schematic

    The two circuits di atas illustrate opening a relay contact a short time after the ignition or...

    servo timer
    servo timer

    The Servo Timer II was primarily designed for parachute deployment on water rockets, but can be...

    Microcontroller Clapper Switch
    Microcontroller Clapper Switch

    For those who are lazy like me, turn on or off the bedroom light without getting out of bed,...

    1N4001 Diodes
    1N4001 Diodes

    This article describes the DDDAC 2000 Audiophile projects (1N4001). The content is very simple,...

    Microchip PIC Programmer ICSP Circuit Guide
    Microchip PIC Programmer ICSP Circuit Guide

    Microchip do not recommend any particular circuit for ICSP programming. There are diagrams for...

    Infrared control dimming circuit
    Infrared control dimming circuit

    Receiving circuit as shown, when the infrared receiver receives the remote control signal emitted...

    Single-speed motor excitation power from a braking circuit
    Single-speed motor excitation power from a braking circuit

    Circuit shown in Figure 3-151. Figure 3-151 (a) of the capacitor banks connected into shape, it...

    Milliammeter table circuit composed of resistance
    Milliammeter table circuit composed of resistance

    Commonly used high sensitivity header is actually using microampere meter, use it to produce...




    Top