BF994S Vishay Telefunken is a N-channel dual gate MOS field effect tetrode produced by Germany vishay telefunken company. It belongs to depletion mode. This product has integrated gate protection diodes, high cross modulation performance, low noise figure, high AGC range, low feedback capacitance, low input capacitance, etc. It is applied to input and mixer stages, especially VHF TV tuners.
This document is a technical datasheet for the Vishay Telefunken BF994S, an N-channel dual gate MOS-field effect tetrode operating in depletion mode. The device features integrated gate protection diodes and is designed for low noise figure and high cross modulation performance.
The datasheet provides absolute maximum ratings, electrical DC and AC characteristics, typical performance curves, and schematic dimensions. It specifies the component's suitability for input and mixer stages, particularly in VHF TV-tuner applications.
| Drain - source voltage (VDS) | 20 V |
|---|---|
| Channel temperature (TCh) | 150 C |
| Forward transadmittance (|y21s|) | Typ. 18 mS |
| Noise figure (F) | Typ. 1.0 dB |
It is suitable for input- and mixer stages, especially in VHF TV-tuners.
It includes integrated gate protection diodes, high cross modulation performance, low noise figure, and low feedback capacitance.
The maximum channel temperature (TCh) is 150 C.