Variable attenuator
#variable attenuator
#PN4391
#Rds(on)
#RF
#signal control
#impedance matching
#low resistance
#JFET
#electronic control
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Jfet Chopper Circuit Circuit
A JFET (MPF102) is utilized to chop a DC signal for amplification in an AC-coupled amplifier. Q3 serves as the chopper element, while Q1 and Q2 create a multivibrator to generate the chopping signal. Additionally, resistor Rr establishes the bias...
JFET AC Coupled Integrator
This is a JFET AC Coupled Integrator circuit. This circuit is used to achieve very high voltage gain. To achieve very high voltage gain, this circuit uses...
The JFET AC Coupled Integrator circuit is designed to provide significant voltage amplification while...
Amatorki projekt
The circuit is designed to add two identical branches to the existing despreading spectrum. The only difference between the branches is the phase of the PN sequences fed into each branch, specifically at the input of a double-balanced mixer. The...
Building an RF Remote Control System For Robotics Control
With a handful of inexpensive components, a little creativity, and the power of PicBasic, you can build some pretty outstanding robotics creations as Rob Arnold proves with his Ruf-Bot project. RF remote control is just way too cool not to...
General-Purpose Jfet Preamp Circuit
This JFET preamplifier has a gain of approximately 20 dB and a bandwidth exceeding 100 kHz. It is useful as a low-level audio amplifier for high-impedance sources.
The described JFET (Junction Field Effect Transistor) preamplifier is designed to amplify low-level audio...
JFET PREamp
The input transistor Q2 is an N-channel JFET. Each specific JFET establishes a particular output bias voltage, necessitating the selection of the JFET from various devices to achieve the desired bias value. Fortunately, due to the low current involved, suitable...
LED RF Signal Strength Meter
RF Signal Strength Meter circuits are popular RF measurement devices. This circuit is one of the simplest but very useful circuits that satisfies your desired accuracy. The heart of measurement is high accuracy but easy to use Logarithmic Detector AD8313...
JFET static detector
This post discusses the construction of multiple versions of JFET static charge detectors, highlighting observed differences that are not easily explained.
The JFET (Junction Field Effect Transistor) static charge detector operates by utilizing the unique characteristics of JFETs to sense variations...
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...