Q Multipliers
#RF
#Q multiplier
#resonance
#tuning
#filter
#inductor
#capacitor
#frequency
#circuit design
#signal processing
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One Receiver
RF Cafe visitor David M. requested the scanning and posting of an article from the January 1963 edition of Popular Electronics, authored by Philip Hatfield from the Receiving Tube Department of General Electric. The article describes a straightforward design utilizing...
inductor Cutting an RL Circuit
Consider a circuit consisting of a voltage source, a resistor, and an inductor arranged in a closed loop. When the voltage source is activated, the circuit reaches a steady state, during which the inductor stores energy calculated by the formula...
Reflex Radio Receiver
The RF signal is transmitted from the antenna through CI to a tuned circuit consisting of LI and C2. One end of L2 delivers the RF signal to the base of Q1 for amplification, while the other end connects to...
By setting the cutoff frequency of the programmable digital low-pass filter
The circuit primarily consists of two Butterworth filters, designed to create a feedback amplifier with a gain of approximately 0.707. It features a differential input amplifier, where one input is grounded, resulting in a single input terminal. The attenuation filter...
schematic of lenovo e317
Analog baseband digital circuit table of contents: EMI interface, BPI bus, JTAG, LCD interface, keypad, UART, MINT, GPIO, MCP keypad, audio, RF, I/O connector, power cones, serial time, battery charging and analog, LED driver, RF control, JTAG, IOTA, audio codecs,...
1kH Synthetic Inductor
Inductors can be easily simulated using operational amplifiers. The circuit presented is designed to achieve an inductance of 1000 H (one thousand Henry) with effective damping. This configuration enables the construction of a resonant circuit with a center frequency of...
Modulation monitor
A broad-tuned receiver demodulates the RF signal picked up by a loosely coupled wire placed near the transmitting antenna.
The broad-tuned receiver operates by utilizing a loosely coupled wire antenna, which is strategically positioned in proximity to the transmitting antenna. This...
Capacitor internal resistor meter
The design presented here works by applying a 50kHz, 200mV square wave to the capacitor under test, in series with a 10 Ohm resistor. The AC voltage appearing across that resistor is measured and displayed on a meter. So the...
Rf Preamplifiers Circuit
In this basic MAR-x-based circuit, both the input and output consist of a single DC-blocking capacitor (C1 for the input and C2 for the output, respectively). The DC power supply network, which includes L1 and R1, is connected to the...