4046 pll design software

A bibliography is included for those who desire to pursue the theoretical aspect. A pll uses a crystal oscillator, but it isnt the main output. I discuss a pll model whose reference input is a sinusoid rather than a phase in part 3. Shit that was started shortly after relatively inexpensive computers made. Looking for 4046 pll experience circuit design engtips. For 1hz to 1khz input range, we design a vco to cover 10hz to 10khz, with some extra range on each end. In fact, its so versatile that well spend the next three sessions exploring it. System requirementsoperating system windows xp, windows xp x64, windows vista, windows vista x64, windows 7. The soc pll in figure 1 integratesmore than 25,000 transistors, whereasthe 4046 chip used roughly 5. Elcapitano, the popular 4046 series of pll chips easily span a 20. A phaselocked loop is a feedback system combining a voltage controlled. A phaselocked loop or phase lock loop pll is a control system that generates an output signal whose phase is related to the phase of an input signal. Basics of phase locked loop circuits and frequency synthesis duration. Thank you for your interest in the pll design software.

If you want a onechip solution, the cmos 4046 ic comes to mind. A phaselocked loop or phase lock loop pll is a control system that generates an output. In a previous article i introduced the fundamental concepts and the core functionality of a negativefeedback system known as a phaselocked loop pll. When i design anything, i divide the circuit into functional blocks, it allows me to test and debug each independently, before integrating the system. Im trying to use the 4046s phase comparator 2, but the output isnt doing what id expect. Cmos phaselockedloop applications using the cd5474hchct4046a and cd5474hchct7046a w. This article presents a simplified methodology for pll design and provides an effective and logical way to debug difficult pll. Formulas are derived from a spreadsheet by philips. He was involved in the design and development of complex terrestrial and satellite communications networks and has made significant contributions in the design and development of rf, radar, guidance, and communications systems at frequencies of up to 100 ghz. Software facilitating the marriage of rf hardware and computer hardware.

Frequency multiplier x100 for a frequency sweep from 500hz. A phaselocked looppll has a voltagecontrolled oscillatorvco. Eine phasenregelschleife, auch als englisch phaselocked loop pll bezeichnet, ist eine. The 4046 datasheet always shows a firstorder loop filter with one or two resistors and one capacitor however, thinking back on my theory from 25 years back, a 0 degrees lock type 2 pll normally needs a secondorder loop filter my thinking is also based on vague memories of the phaselockloop design fundamentals application note from motorola, an535d. As you helped me previously for designing of vco as i desired, now if you help me again for implementation of 4046 in same software containing frequency band from 7. Designing and debugging a phaselocked loop pll circuit can be complicated, unless engineers have a deep understanding of pll theory and a logical development process. To model a phase locked loop in multisim requires building the phase locked loop components on your own. Design the loop compensation slow enough for use at 500hz, and set the maximum frequency at say 7. Drentea has developed several stateoftheart rf products including ultrawideband. Pll using 4046 phase locked loop electronic circuits. The adpllalldigital pll the spll software pll in our project, we propose to implement a high frequency dpll our objective is to design a pll for high frequency signal whose frequency is at least as high as 20 mhz. The ability to integrate many moretransistors has enabled analogmixed. A tiny useful discovery about the 4046 phase locked loop chip. The loop filter can be passive or active depending on the vcc of the pll device that should drive the vco tuning voltage.

I am really not sure why you need a square wave, can you explain that, please. Although the parameters of the filter restrict the loop capture range and speed, it would be impossible for the phaselocked loop to lock without it. The phase locked loop, pll is a very useful building block, particularly for radio frequency applications. It is used in a closed loop control to maintain a stable frequency.

And here i though math made designing the hardware possible. The loop filter is a given, just r and c and, perhaps, an op amp a saturating one. I thnk this diagram was repeated in other motorola pll design and application notes but i have no reference for those. Mixed and interface circuits it is used in a closed loop control to maintain a stable frequency. The 567 tone decoder is perhaps most famous phase locked loop pll chip. How to make a 4046 pll work keiths electronics blog. Oct 19, 2016 cd4046 is a pll or phase lock loop, it mainly consists of a vco and phase comparators. Max2769max2769c pll loop filter calculator user guide. Hes discussing plls in the context of software, as part of a weather fax decoder.

This gives us a very flexible vco capable of operating anywhere up to 17 mhz, something the early cmos versions were incapable of doing. Jun 29, 2018 figure 2 functional diagram of the 4046 phaselockedloop with vco the exact ranges and component values are determined by extensive charts included in the 4046 data sheet 443k in pdf format. How to design and debug a phaselocked loop pll circuit. Adi hmc pll design software download design center analog. Sep 10, 2011 most of the advances in frequency,power per megahertz, and area are duesimply to advances in process technologyand would not be surprisingto anyone familiar with moores law.

The loop calculator tool calculates component values for pll loop filter design. Modern communications receiver design and technology. The cd4046b design employs digitaltype phase comparators see figure 3. Most of the advances in frequency,power per megahertz, and area are duesimply to advances in process technologyand would not be surprisingto anyone familiar with moores law. Appendix c basic program for vco frequency calculations. Thats why id like to implenent pll in software like 4046 series. I want to see what results i should be expecting first, but i couldnt find a 74hc4046 chip in the multisim software. This article presents an ltspice circuit that can be used to explore the behavior of a phaselocked loop. Hello im designing a phase locked loop circuit and i need help with the filter calculations for phase comparator 2 for being able to choose the best components for it. Within a phase locked loop, pll, or frequency synthesizer, the performance of the voltage controlled oscillator, vco is key. Instead of a simple phase detector, the design uses a harmonic mixer. How might one implement pll phase lock loop in ltspice.

The classical voltage phase detector in the past, active filters have been emphasized for several reasons that are explained in. Looking for 4046 pll experience geekee electrical 25 jul 12 09. Cd74hct4046a high speed cmos logic phaselockedloop. Functional blocks are implemented by software rather. Phaselocked loop design through the decades part 1. The hef4046b is a phaselocked loop circuit that consists of a linear voltage controlled oscillator vco and two different phase comparators with a common signal input amplifier and a common comparator input. Phaselocked loop design through the decades part 1 embedded. A versatile building block for micropower digital and analog applications 5 3. Neither one will be easily adopted to scanning function you desire. The phaselocked loop pll is a device with many interesting applications, including frequency synthesis, fm demodulation, and television sweep circuits. The root locus for a typical loop transfer function is found as follows. One more thing must be considered in loop filter design. Its encouraging to see that once the capture range is set properly, the 4046 really works predictably.

As we know, last year, one group also dealt with pll. Fm demodulator using a 4046 pll electronics forum circuits. The voltage controlled oscillator performance governs many aspects of the performance of the whole phase locked loop or frequency synthesizer. Software based phase lock loop arduino forum index.

Whilst poring over 4046 phase locked loop data sheets, i noticed yet another subtle useful difference between the the later faster 74hc4046. Jun 29, 2014 when i design anything, i divide the circuit into functional blocks, it allows me to test and debug each independently, before integrating the system. The loop filter design is critical to get the desired performance from the pll, as there are many tradeoffs between the design specifications that need to be met. Im new to the forum, so i hope this post is in the right place. Of course, i wired the tilt sensors output to the 4046. Phaselocked loop design fundamentals application note, rev. Shit that was started shortly after relatively inexpensive computers made it to the benches of amateur radio operators, and. Does anyone know how i can find the 74hc4046 chip in that software. Carrier recovery the pll tracks color bursts in a tv signal. The ic4046 is phaselocked loop ic of cmos digital combined analog and digital chip. As you may recall, the most basic pll consists of a phase detector actually a phase difference detector, a lowpass filter, and a. Productdevelopment and troubleshooting description of the problem. Type 2 pll normally needs a secondorder loop filter my thinking is also based on vague memories of the phaselockloop design fundamentals application note from motorola, an535d.

Before running the example, make sure you have modelsim or modelsimaltera software installed on your computer. The 4046 phaselocked loop pll chip is a fantastic chip to experiment around with. Download pspice for free and get all the cadence pspice models. As the number of automaker recalls due to software issues are increasing and. As noted above, the pll takes a couple of seconds to lock to the input signal, but once it does, its rocksolid every time. Stability phaselocked loop design fundamentals application note, rev. The 4046 cmos micropower pll,which rca introducedin the 1970s, is one of the early pllics. Cd4046 is a pll or phase lock loop, it mainly consists of a vco and phase comparators. The pll forms the basis of a number of rf systems including the indirect frequency synthesizer, a form of fm demodulator and it enables the recovery of a stable continuous carrier from a pulse waveform. Its operation seems nearly miraculous, but feedback makes the job easy, and it is an excellent example of feedback in action. The adpllalldigital pll the spllsoftware pll in our project, we propose to implement a high frequency dpll our objective is to design a pll for high frequency signal whose frequency is at least as high as 20 mhz. Hello i am designing a frequency multiplier locked to the mains frequency, i. Adi hmc pll design software download design center. A phaselocked loop pll has a voltagecontrolled oscillatorvco.

However, they design their pll circuit suitable for 10 mhz input signal. Pll using 4046 phase locked loop cd4046 is a pll or phase lock loop, it mainly consists of a vco and phase comparators. Before approac hing the design problem, it is necessary to understand principles of op eration and c haracteristics of the pll. Dear respected ronsimpson, first of all thank you very much for your kind help and positive response again and again. Phase lock loop 4046 band width electronics forums. Aug 30, 2015 the ic 4046 is phaselocked loop ic of cmos digital combined analog and digital chip. The block i was testing is the classic demodulator circuit using a pll, and a plain vainilla ic amp, as shown in the image. Lecture 090 pll design equations and pll measurements reference 2, previous. Looking for 4046 pll experience looking for 4046 pll experience benta.

Because of the many tradeoffs involved, the use of a pll design program such as. Can anyone help me to use 4046 as frequency to voltage converter. In any feedback circuit, the possibility of instability and oscillation is a very real threat, and must always be taken into consideration. Other than that i found out that the application note at page 19 see attach below with an ic hcf4046 show a not constant value on pin 1, while, once that is locked, it should be constant i.

This is a component in fm demodulation and modulation. A 7 v regulator zener diode is provided for supply voltage regulation if necessary. Sep 10, 2017 software facilitating the marriage of rf hardware and computer hardware. Based on the datasheet, i expect the output to be vdd, vss, or high impedance, but im only seeing very small output voltages even without any load attached to it e. The hchct4046a pll with vco is a highspeed cmos ic designed for use in. Im trying to use the 4046 s phase comparator 2, but the output isnt doing what id expect. Cmos phaselockedloop applications texas instruments. Since the scope of this article is practical in nature all theoretical derivations have been omitted, hoping to simplify and clarify the content. Problem measuring frequency and phase of the grid using. This article presents a simplified methodology for pll design and provides an effective and logical way to debug difficult pll problems.

The oscillator generates a periodic signal, and the phase detector compares the. Frequency multiplier for synchronization question type. Appendix e hc4046a pll layout with simple rc filter r3c2. Phase lock loop is a electronics feedback method to stabilize the desired output by comparing the phase of the reference. High speed cmos logic phaselockedloop with vco cd74hct4046a. How to simulate a phaselocked loop technical articles. I have an ezkit lite dsp board from adi with adsp21262 onboard as basis fclk200mhz. The 4046 is a very easy device to get working in the lab and in pspice too and i have used it in chaos circuit design see attached papers. Free online engineering javascript calculator to quickly estimate the component values used for a 4046 vco with pll.