Voltage Controlled Current Source Phase Locked Loop
#voltage controlled
#current source
#phase locked loop
#PLL
#feedback
#control system
#signal processing
#analog circuit
#precision
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pll circuit
This page will be updated as material becomes available. This new system will essentially replace the original BCD design, which was created by WB6IGP and N6IZW and was featured in the ARRL UHF/Microwave Project Manual. Their work was later revised...
Bilateral current source
The circuit will produce the current relationship to within 2% using 1% values for R1 through R5. This includes variations in R1 from 100 ohms to 2000 ohms. The use of large resistors for R1 through R4 minimizes the error...
Current source
This precision current source features output current ranges from 10 µA to 10 mA, with an output compliance of 30 V to -5 V. The output current is fully adjustable within each range using a calibrated ten-turn potentiometer. An error...
OCL yourself feedback amplifier analysis
The DC feedback circuit is illustrated in Figure 1-31. In this circuit, resistor R7 is connected to the output terminal, which is the midpoint of the static differential input stage voltage Vr, between the base terminals. This configuration represents a...
PLL IR LASER LIGHT RECEIVER
Circuit schematics for the 555-based PLL laser light PFM receiver. Although R4 is shown as a resistor, it is advisable to replace it with a 10-kΩ precision potentiometer to allow for fine-tuning of the transmitter's center frequency. Experimentation with the...
Voltage controlled gain amplifier circuit diagram
A 1.53 voltage-controlled gain amplifier (VGA) utilizes a FET connected between the two inputs of the operational amplifier (op-amp) as a voltage-controlled resistance. The resistance changes linearly with voltage and varies from several dozen square ohms, exhibiting excellent control characteristics....
Cold Atom Control System for PC
We have developed a powerful yet inexpensive and easy to construct experiment control system. The construction of the system together with the control software is described here. All circuits and software are free to download and use for nonprofit. The...
SAA1057 PLL Synthesized FM Transmitter
The operation of the circuit is managed by a microcontroller from MICROCHIP, specifically the PIC16F84. This microcontroller supports buttons and a 2-line, 16-character LCD display, along with the PLL circuit SAA1057. The voltage-controlled oscillator (VCO) is implemented using transistor Q8,...
Pll receiver
This simple AM circuit utilizes a 561B. It lacks an inductance/capacitance tuning circuit, as the 365 pF capacitor connected between pins 2 and 3 is responsible for all tuning. A good external antenna and a solid ground connection are required...