The Siemens BFQ 28 is a bipolar silicon NPN microwave transistor housed in a hermetically sealed metal-ceramic 100 mil package similar to TO 120. It is designed for low noise amplifiers and oscillators operating up to 4 GHz. The device utilizes state-of-the-art manufacturing methods, including ion implantation and titanium-platinum-gold metallization, to ensure high reliability. It is marked on its package with the short designation "28".
| Package Type | hermetically sealed metal-ceramic 100 mil package similar to TO 120 |
|---|---|
| Minimum Noise Figure | 3 dB |
The minimum noise figure is 3 dB.