The frequency multiplier circuit composed of PLL
#PLL
#frequency multiplier
#RF
#signal processing
#phase detector
#VCO
#synthesizer
#communication
#electronics
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RF Actuated Keying Monitor
Sending Morse on a rig without a sidetone is not impossible, but is not particularly pleasant either. This battery-powered monitor has been designed to provide an audible indication of keying for those whose rigs lack a CW sidetone. Its sensor...
PLL FM demodulator 4046
The circuit utilizes the 4046 Phase-Locked Loop (PLL) for FM demodulation, incorporating an intermediate frequency (IF) FM demodulation output based on the input signal frequency.
The 4046 PLL is a versatile integrated circuit that can be configured for various applications, including...
TRF1115 RF Down-Converter
The TRF1400 VHF/UHF RZ ASK remote control receiver is specifically designed for RZ ASK (return-to-zero amplitude-shift keyed) communications systems operating in the 200-MHz to 450-MHz band. This device is targeted for use in automotive and home security systems, garage door...
PLL FM Demodulator
A Phase Locked Loop (PLL) can be utilized to create a Frequency Modulation (FM) demodulator. The PLL circuit tracks the input frequency by adjusting the voltage input of a Voltage-Controlled Oscillator (VCO).
The Phase Locked Loop (PLL) is a critical component...
Simple VCO with 1 transistor
Unijunction transistors are very interesting. They love to be used in oscillators, and it doesn't take too many parts or very much coaxing to get their sawtooth outputs. This little squealer will tell you how much voltage it's connected to....
PLL Hum Cancellation Circuit
This report outlines the operation and adjustment of a Phase Locked Loop (PLL) hum cancellation circuit designed to reduce residual hum from amplifiers. This circuit is particularly useful for Directly Heated Triode (DHT) amplifiers with AC-operated filaments, where a residual...
4 Band Double Tuned Preselector
The circuit requires an RF input, which can be sourced from either a long wire or a loop antenna. The preamplifier operates within a frequency range from 550 kHz (Medium Wave) up to 30 MHz in the shortwave band. The...
Audio frequency multiplier circuit diagram
The circuit can be selectively tuned to two closely related tones. The selective frequency is determined by the values of the feedback circuit connected to the collector and base of Q1, which includes capacitors and resistors. When the specified values...
Rf Upconverter For Tvro Subcarrier Reception
This converter utilizes a 40673 MOSFET to heterodyne the 5.5 to 8 MHz TVRO subcarriers to the FM broadcast band, enabling the use of a stereo receiver for high-fidelity stereo reception of TV sound subcarriers. Z1 is a prepackaged 100...