PLL AM LO
#PLL
#AM
#local oscillator
#frequency synthesis
#RF signal
#tuning
#phase detector
#VCO
#mixer
#demodulation
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Linear Vco
This voltage-controlled oscillator (VCO) utilizes an LF356 operational amplifier to create a linear relationship between frequency and voltage, employing the CMOS HC4046. The frequency range can be adjusted by modifying the capacitor connected between pins 6 and 7 of the...
The PLL FM demodulator (4046) circuit
The FM demodulator circuit, as illustrated in the figure, utilizes a 4046 Phase-Locked Loop (PLL) integrated circuit to convert the intermediate frequency FM input signal into a lower frequency output.
The FM demodulator circuit based on the 4046 PLL IC operates...
Mixer Diplexer
By inserting a high-pass filter section in the intermediate frequency (IF) lead, this mixer is terminated at all frequencies except for the IF, which results in improved intermodulation distortion (IMD) for other mixer products. In this example, the high-pass filter...
PLL Exciter-2
This is a Phase-Locked Loop (PLL) controller designed to operate with a Voltage-Controlled Oscillator (VCO) and modulator. These two modules should be utilized together to create a complete baseband-capable exciter unit. The PLL controller incorporates a stable crystal-controlled reference and...
mic mixer circuits
The mixer circuit features two line inputs and two microphone inputs, along with two line outputs. The microphone inputs are designed for low-impedance dynamic microphones with an impedance range of 200-1000 ohms. This simple mixer was specifically designed to accommodate...
6 Input Mixer
The mixer circuit below has 3 line inputs and 3 mic inputs. The mic inputs are suitable for low impedance 200-1000R dynamic microphones. An ECM or condenser mic can also be used, but must have bias applied via a series...
Hybrid mixer
ICla and IClb are biased into the linear regions by resistors R3 and R4. (IC1 must be a 4011A). The outputs from the gates are combined by operational amplifier IC2, which provides a low impedance output.
In this circuit description, ICla...
4-Channel Mixer
The proposed mixer is designed around four current-driven transconductance amplifiers contained in an SSM2024 from Precision Monolithics. To achieve low offset and high control rejection, the four inputs should have an impedance to earth of approximately 200 ohms. These impedances...
VCO Seiler 80Mhz-300Mhz
The voltage-controlled oscillator (VCO) is widely utilized in various RF projects, with a particular emphasis on wideband GHz VCOs over VHF/UHF VCOs. This document outlines a Manhattan Island Pad construction for a VHF VCO, operating from low frequencies of 88...