FM05TXNV is an FM PLL radio broadcast board for educational or similar use that offers improved performance over the previous popular version (e.g., better audio quality, adjustable RF out power, easier frequency selection using only four keys, lower profile to fit 1U rack mount enclosures, etc.). The previous version is no longer available. You connect audio and send it wirelessly (using whip antenna, distance varies with surrounding conditions, guaranteed output 1W minimum over the entire band). FULL BROADBAND DESIGN, no variable caps to adjust! Reception is on a regular FM radio set anywhere from 87.5MHz to 108MHz (special model for 76-90MHz Japanese band also available) and minimum step of 10KHz....Go

It makes a frequency 145 - 10.7 = 134.3MHz in the purpose to use at the 145MHz band of the amateur radio. 10.7MHz are an intermediate frequency in the FM. MC145163 can not handle a 130MHz frequency directly. Because it is, it is inputting to MC145163 after lowering a frequency to 15MHz using the outside oscillator. The outside oscillator is good with the crystal oscillator but is using a PLL oscillator to suppress a frequency change to the utmost. It is using a 10.24MHz crystal oscillator for the reference frequency of MC145163. It divides it to 1/1024 and it makes 10KHz a phase comparison frequency. The output frequency can be changed in the 10KHz unit by the specification of the dividing ratio....Go

The PLL synthesizer oscillation circuit to introduce here is using the PLL frequency synthesizer (MB87014A). It is possible to make oscillate the stable high frequency signal. The PLL is the abbreviation of Phase Locked Loop. In the operation of the PLL, it compares the frequency of the reference frequency oscillator and the frequency of the voltage controlled oscillator by the phase. When there is a difference of the phase, it works as if to control the VCO and to lose the difference....Go

This is a PLL controller that works with the VCO/Modulator that I designed. Use these two modules together for a complete baseband-capable exciter unit. This PLL controller features a rock-stable crystal controlled reference, in conjunction with a programmable dividing network which allows the transmitter to be tuned in 100Khz steps from 79.9Mhz to 109.7Mhz by means of digital thumbwheel switches....Go

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lots of shcematics and circuits....Go

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Dual-speed PLL designed for wideband FM transmitter....Go

30MHz PLL-Generator,this project uses a PIC mcu...Go

the PLL synthesizer oscillator by MC14046B which can change the frequency. The PLL oscillator can be made using three kinds pieces of the ICs like the figure above. Because most of the functions are stored in the ICs, there are few, too, circumference circuits and the making is easy....Go