Typically connected to the system ground or a self-biasing resistor network. The substrate is often tied to this lead to minimize RF feedback.
The 3SK41’s two gate terminals are its defining feature. In a typical dual‑gate MOSFET, is the input that receives the RF signal to be amplified, while Gate 2 is used for a control voltage. By varying the voltage on Gate 2, the circuit can adjust the transistor’s gain, a technique known as Automatic Gain Control (AGC) in receivers. This allowed radio designers to build simpler and more sensitive front‑ends for FM tuners without relying on variable attenuators or multi‑stage control loops.
The 3SK41 is a depletion‑mode, N‑Channel dual‑gate MOSFET. Unlike a standard MOSFET, it features two electrically independent gate terminals (Gate1 and Gate2) that provide greater flexibility in circuit design, especially for gain control and mixer stages. The four leads (Source, Drain, Gate1, Gate2) are housed in a compact hermetically sealed , a standard for high‑reliability RF transistors of its era. 3sk41 datasheet
Compact signal routing in legacy military and industrial telecommunication arrays. Cross-Reference and Equivalents
If you are searching for the , you are likely either repairing a classic tuner from the 1980s–1990s, designing a low-noise front-end for a receiver, or trying to cross-reference a replacement. This article serves as a detailed datasheet analysis, covering absolute maximum ratings, electrical characteristics, pin configurations, application circuits, and modern alternatives. Typically connected to the system ground or a
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As a GaAs device, the 3SK41 is highly sensitive to Electrostatic Discharge (ESD). Always wear a grounding wrist strap and use static-safe workstations when handling the component. In a typical dual‑gate MOSFET, is the input
If you are having trouble finding the and need sourcing guidance.
The original highlights it as an ideal choice for electronic tuners in TVs and VCRs, as well as FM radio front-ends.
