Dual N-channel dual gate MOSFET
Rev. 01 — 16 March 2005
Product data sheet
1. Product proﬁle
1.1 General description
The BF1208 is a combination of two dual gate MOSFET ampliﬁers with shared source
and gate2 leads and an integrated switch. The integrated switch is operated by the gate1
bias of ampliﬁer B.
The source and substrate are interconnected. Internal bias circuits enable
DC stabilization and a very good cross-modulation performance during Automatic Gain
Control (AGC). Integrated diodes between the gates and source protect against excessive
input voltage surges. The transistor has a SOT666 micro-miniature plastic package.
This device is sensitive to ElectroStatic Discharge (ESD). Therefore care should be taken
during transport and handling.
s Two low noise gain controlled ampliﬁers in a single package. One with a fully
integrated bias and one with a partly integrated bias
s Internal switch to save external components
s Superior cross-modulation performance during AGC
s High forward transfer admittance
s High forward transfer admittance to input capacitance ratio
s Gain controlled low noise ampliﬁers for VHF and UHF applications with 5 V supply
x digital and analog television tuners
x professional communication equipment