3sk41 Datasheet

– The control gate, usually used for Automatic Gain Control (AGC) or local oscillator (LO) injection. Pin 4: Gate 1 (G1) – The primary RF signal input gate. 3. Absolute Maximum Ratings

Standard transistors were prone to oscillation and cross-modulation, essentially creating interference that ruined the picture. The datasheet for the 3SK41 reveals the solution: a device with two control gates instead of one. By inspecting the pin configuration and electrical characteristics in the document, we see a device designed for "Automatic Gain Control" (AGC). The first gate accepted the weak signal from the antenna, while the second gate controlled the amplification factor. This allowed the TV to maintain a clear picture whether the signal was booming from a nearby tower or faint from a distant transmitter. The datasheet’s curve tracer diagrams, showing the relationship between Gate 1 and the drain current, are essentially a blueprint for the stable, reliable television set.

Because the 3SK41 is no longer in active mass production by original semiconductor giants, looking up active inventory or complete datasheet indexes requires targeting legacy electronic component distributors:

A highly popular, widely available Silicon dual-gate MOSFET from NXP/Infineon. While it has different biasing characteristics because it is silicon-based rather than Gallium Arsenide, it serves a very similar functional purpose in VHF/UHF amplifier and mixer stages.

However, the 3SK41 datasheet also serves as a marker of technological evolution that has already passed. If one were to search for this component today, they would find it categorized as "Obsolete" or "End of Life." The dual-gate MOSFET was a brilliant solution for analog broadcast technology. Today, the world has shifted to digital broadcasting, where complex silicon tuners integrated into single chips handle the heavy lifting. The discrete, analog finesse required by the 3SK41 is no longer necessary. In this sense, the datasheet is a tombstone for analog engineering. It represents a time when signal processing was a physical, analog struggle against noise, rather than a mathematical, digital manipulation of bits. 3sk41 datasheet

: In many circuits, it can be part of a broader series of "3SK" transistors (like the 3SK35 or 3SK40) depending on the specific voltage and gain requirements of your project. Jotrin Electronics Are you looking to use this for a new RF design 3SK41 - NEC/HITACHI/MOTOROLA - Jotrin

: By varying the voltage on the second gate ( VG2Scap V sub cap G 2 cap S end-sub ), the gain of the transistor can be easily controlled.

Typically acts as the primary signal injector. Because the input capacitance ( Cisscap C sub i s s end-sub

): Maximum voltage allowable across the drain and source channels (typically around 10V to 15V). Gate 1-Source Voltage ( VG1Scap V sub cap G 1 cap S end-sub – The control gate, usually used for Automatic

The is a historically significant, high-performance N-channel dual-gate MOSFET designed primarily for high-frequency (RF) amplification, mixing, and switching applications . Jointly associated with major semiconductor manufacturers like NEC, Hitachi, and Motorola , this component has been a staple in communication equipment and sensitive analog circuits.

The 3SK41 utilizes a classic (frequently cross-referenced with the TO-72 form factor). The metal shell serves a dual purpose: it provides robust thermal dissipation and functions as a Faraday shield to decrease electromagnetic interference (EMI) when grounded.

Because the 3SK41 is an older component, it can sometimes be difficult to source. If you cannot find an original, consider these common substitutes: Very similar characteristics, often interchangeable.

) between the input gate and the output drain, preventing high-frequency instability and self-oscillation without requiring complex neutralization circuits. 2. Automatic Gain Control (AGC) Capability The secondary gate ( G2cap G sub 2 Absolute Maximum Ratings Standard transistors were prone to

) and snappy transit times, the 3SK41 excels in analog gating circuits and power-conscious switching sub-systems. Direct Cross-References and Equivalents

Operating the 3SK41 beyond these limits can cause permanent damage. Always design with a safety margin of at least 20-30% below these maximums. Drain-Source Voltage ( VDScap V sub cap D cap S end-sub

The dual-gate structure of the 3SK41 makes it highly versatile in discrete RF receiver front-ends:

To download the complete PDF graphic layout, search archiving platforms like AllDatasheet .

) of the transistor. This functionality is perfect for variable gain amplifiers and RF front-ends in communication receivers, helping prevent signal overloading. 3. High-Efficiency Low-Noise Mixing