Monolithic Low Noise Amplifier with Limiting.
Patent, Filed 27 Jan 86, patented 28 Jul 87,
DEPARTMENT OF THE AIR FORCE WASHINGTON DC
Pagination or Media Count:
A single circuit which provides forward biasing, input impedance matching and voltage input limiting to a transistor which has a source, gate and drain terminal is presented. Biasing, input matching and limiting for a transistor is accomplished using two inductor coils, five crystal diodes, a positive voltage source, and three resistors. The forward biasing is achieved using three resistors, and the third, fourth and fifth crystal diode. The third resistor connects the drain terminal of the transistor to the positive voltage source. The second resistor connects the junction between the third resistor and the drain terminal to the transistors gate terminal. The forth and fifth crystal diodes are connected in series between the source terminal and the common electrical ground. The first resistor and third diode are connected in parallel between the transistors gate terminal and the common electrical ground. Limiting of the input voltages over the gate terminal is accomplished by the first and second crystal diodes which are connected in series with each other and in a parallel circuit with the first resistordiode and the common electrical ground.
- Electrical and Electronic Equipment