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ADF4158 PLL strange moving spurs
On the 10 MHz fundamental I only measure the HP8562E PN flloor meaning that the TCXO phase noise is better than the spectrum analyzer noise floor. I`ve measured some harmonics from 20 MHz to 1 GHz. There are still measurable harmonics up to 2-3 GHz. 2. TCXO Slew rate have been measured at about 2. 5~3ns/V = 400V/us which
PLL FM Demodulator Circuit Module
This is a circuit about PLL system that can be used to implement an FM demodulator. Since the VCO output tracks the FM signal, and the VCO input voltage is proportional to the VCO output frequency, then the VCO input will be equal to the demodulated signal. This circuit is based on phase comparator and VCO. This is the figure of the circuit. For t
Circuit diagram 500mW FM PLL transmitter 88-108MHz using LMX3206 and PIC16F870
This oscillator is called the Colpitts oscillator and voltage controlled to achieve the FM (frequency modulation) and PLL control. T1 must be HF transistors to work well, but in this case I use a cheap and common BC817 transistor. LC tank oscillator needs to oscillate properly. (I must warn you that the signal is not symmetrical in form. Pulsa pos
Noise Floor Measurement Circuit of PLL Frequency Synthesizers
Phase noise is a critical performance parameter of frequency synthesizers for wireless applications. RF system designers of phase modulated cellular systems, such as PHS, GSM and IS-54, need low noise local oscillator (L. O. ) or frequency synthesizer blocks. This is a design circuit for the measurement system. This is the figure of the circuit;...
Phase Locked Loop (PLL) Operating Principle Phase Detector VCO LPF
Phase Locked Loop (PLL) Operating Principle with block diagram showing Phase Detector, Voltage Controlled Oscillator, Low Pass Filter..
Circuit Envelope Simulation Schematic of the PLL
PLL FM Detector using PLL IC 565
Phase Lock Loop (PLL) FM Detector with 565 PLL IC. the circuit diagram and internal structure of PLL IC 565 is shown in the given figures..
PLL Frequency Synthesizer
The ADF4252 Fractional-N Synthesizer when combined with a VCO and loop Filter forms a complete phased locked loop (PLL). This solution from ADI creates state-of-the-art LO`s (local oscillator) for the upconversion and downconversion of RF signals in Wireless applications. The ADF4252 CAN provide the LO for both RF and IF sections. The RF section i
Lowest Phase Noise PLL Synthesizer Using Fractional-N Technology
The ADM1066 is a configurable supervisory/sequencing device that offers a single-chip solution for supply monitoring and sequencing in multiple-supply systems. In addition to these functions, the ADM1066 integrates a 12-bit ADC and six 8-bit voltage output DACs These circuits CAN be used to implement a closed-loop margining system that enables sup
1550 MHz To 2150 MHz Quadrature Modulator With Integrated Fractional-N PLL And VCO
The ADUC812 MicroConverter is a fully integrated 12-bit data acquisition system-on-a-chip. Like all of ADI`s MicroConverter products, it features precision A/D & D/A conversion and a Flash Microcontroller on a single chip.
AN6591FJM Transmission / Reception Single Chip Pll Ic For Phs Cordless Telephone Panasonic Semiconductor
The AN7158N is an integrated circuit designed for power Amplifier of 7. 5W (16V, 4) output with low noise and low distortion, and it suits TV set with multi-sound. Stereo operation is enabled due to incorporating two Amplifiers on one chip. 12-pin SIL package enabled com- pact and high-densely mounted set. By Panasonic USA
CDCF5801 Low Jitter PLL Based Multiplier/Divider With Programmable Delay Lines Down To Sub 10ps
The CF5019 series are high-frequency, 3rd overtone crystal Oscillator module ICs. They incorporate an oscilla- tor circuit and an output Buffer that operate at high frequency on a single chip. The Oscillator circuit employs CMOS inverters and a built-in damping resistor RD, reducing the crystal current compared with existing devices. The damping r
CXA1786N 1.1ghz-band Pll Ic For Mobile Communications
The CXA1821M is an IC developed for compact disc players. This IC incorporates an APC circuit and RF, focus error, and tracking error Amplifiers for 3- spot optical pickup output. (The voltage-converted optical pickup output is supported. ) By Sony Electronics
L2572 Wideband Pll Fm Demodulator
LA3361 PLL FM Multiplex Stereo Demodulator
The LA3370 is a multiplex IC for FM car stereo, and it has the following 2 functions through its utilization of the IF meter output voltage, etc. 1. Stereo noise control (SNC) under which the noise particular to the FM stereo unit in the weak electric field is reduced smoothly. 2. High-cut control (HCC) under which the high frequency is smoothly a
LA3370 PLL FM Stereo Demodulator For FM Car Radios
The LA3401 is an MPX IC for FM car stereo use. It con- tains the VCO non-adjusting function, skip noise eliminat- ing function, and pilot cancel function and is packaged in a 16-pin SIP. By Sanyo Semiconductor Corporation
LA3430 VCO Non-adjusting Multi-PLL For FM Car Radios
The LA4165M Recording-Playback IC combines the functions required to design the recording and playback systems and Motor Control circuits for micro- or standard-cassette tape recorders into a single chip. Functions provided include Automatic Audio input sensing during recording with stepless setting of the on-off threshold using the playback Volum
LC72146M PLL Frequency Systhesizer
LMC568 Low Power Phase-Locked Loop
The LMD18200 is a 3A H-Bridge designed for motion control applications. The device is built using a multi-technology process which combines bipolar and CMOS control circuitry with DMOS power devices on the same monolithic structure. Ideal for driving DC and stepper motors; the LMD18200 accommodates peak output currents up to 6A. An innovative circ
LTC1436ACGN-PLL High Efficiency Low Noise Synchronous Step-Down Switching Regulators
In Broadband networking and high speed computing applications, multiple high current, low voltage power supplies are needed to power FPGAs Flash memory, DSPs and Microprocessors One such example calls for a maximum of 60A of current to power the CPU at 1. 5V and up to 15A to power the memory at 2. 5V from a 12V input. While a customized DC/DC...
MC33493 Pll Tuned Uhf Transmitter For Data Transfer Applications Inc
MC33596 MC33596: PLL Tuned UHF Receiver
MC44BS373CA MC44BS373CA: PLL Tuned UHF And VHF Audio/Video High Integration Modulator
MC44BS374CA: PLL Tuned UHF and VHF Audio Video High Integration Modulator MC44BS374CA The MC44BS374CA Audio and Video Modulator is for use in VCRs, set-top boxes, and similar devices. By Freescale Semiconductor, Inc
MC44BS374CA MC44BS374CA: PLL Tuned UHF And VHF Audio/Video High Integration Modulator
NE568 NE568A;SA568A 150MHz Phase-locked Loop
NJM2268 is a dual Video 6dB Amplifier with 75 drivers for S-VHS VCRsHI-BAND VCRsetc. One channel has clamp function that fixes DC level of Video signal and another one is bias type. Furthermore it has 75 drivers to be connected to TV monitors directly and sag corrective circuits that prevent the generation of sag with smaller capacitance than...
PLL1706DBQ 3.3-V DUAL PLL MULTICLOCK GENERATOR
This application report presents one possible solution to the telecom plug-in power problem, based on a nominal 48 Vdc system bus and a module needing two low-voltage supply outputs. The material includes a detailed design methodology for tailoring the circuit to the specific requirements of the reader`s system. The solution is based on two dev
SC9256 PLL FOR DIGITAL TUNING SYSTEM
The SC9270C/ SC9270D is a complete DTMF receiver integrating both the bandsplit Filter and digital decoder functions. The Filter section uses switched capacitor techniques for high- and low-group Filters and dial-tone rejection. Digital counting techniques are employed in the decoder to detect and decode all 16 DTMF tone-pairs into a 4-bit code. E
TDA9813T TDA9813T VIF-PLL With QSS-IF And Dual FM-PLL Demodulator
The TEA1069 and TEA1069A contain all the functions needed to build a highly featured, high-performance fully electronic telephone set. The device incorporates a speech/transmission part, a dialler part and a ringer part. By offering a wide range of possible adaptations for each part, the TEA1069 and TEA1069A application CAN be easily adapted to me
TUA6020 Stationary - MOPLL & Silicon Tuner 2 Band TV Tuner Mixer-Oscillator-PLL With Balanced IF-Amplifier
Spur Problem in a PLL Circuit
Hello friends I have a problem in a PLL. I have used a loop filter as shown in this figure: But the output spectrum is as shown in this figure: What`s ..
TDA9887 IF-PLL demodulator with FM radio circuit
The IC is an alignment-free multistandard (PAL, SECAM and NTSC) vision and sound IF signal PLL demodulator for positive and negative modulation, including sound AM and FM processing. A special function is implemented for the demodulation of FM radio signals (fRIF = 10. 7 MHz).
PLL FM Transmitter Circuit
The PLL transmitter exciter has the functions of providing a stable, low noise, frequency-selectable RF signal and amplify it to a controllable output power sufficient to drive the power amplifier. It uses a PLL frequency synthesizer built with MC145151, which covers the FM band in 100kHz steps. The VCO covers only a few MHz without readjustment.
FM Radio Circuits
RF Transmitter Circuits
RF Receiver Circuits
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FM Transmitter Circuits
Ultrasonic distance finder circuit
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is measured. There are three main categories of distance measurement methods in use: a) By...
Simple Metal detector circuit with CD4030
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to find something potentially valuable, hidden a few centimeters below the soil. So many...
Fully automatic watering circuit for flower pots
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This circuit comes as a solution to this problem. Depending on humidity of the pot at...
Simple deep searching metal detector circuit
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the circuit of this metal detector, it is possible to detect a metal coin in depth of 90 to...
Sub-Harmonic Bass Converter for Electric Guitars
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound, such as filtering or distortion. Instead, a frequency division system produces outputs...
Echo Depth Sounding Sonar for Boats
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the calibration of the rope. This arrangement still exists in some yachts. The big...
100W HiFi Audio Amplifier Circuit
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power supply must be symmetrical so that no electrolytic capacitors are needed at the outlet....
Plant-Pot Water Level Indicator Circuit
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower. The circuit of the device is shown in Figure 2. The water detection is made from the bottom...
Analogue Sound Preasure dB-Meter Circuit
The best human ear can capture sounds from 20Hz to 20KHz. These limits are known to be the broadest that can exist. Normally the normal limits range from 100Hz to about 13KHz and depend on the age and health of the individual. We for our measurements and to have a good accuracy we will get the limits of 20Hz to 20KHz. A sound to be heard does...
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