MULTI-CASCADE AMPLIFIER Russian patent published in 2007 - IPC H03F3/60 

FIELD: radio engineering for amplification of ultra-high frequency signals.

SUBSTANCE: multi-cascade amplifier contains minimally two analogical amplification cascade with transistors 2,5, connected in circuit with common emitter, and inter-cascade synchronizing circuit 3. Each amplifying cascade contains stabilizing multi-pole 1,4 containing resistors 6-9, capacitors 10,11, first input of multi-pole is the input of amplifier cascade, second input is connected to base of transistor, third input - to collector of transistor, fourth input - is the output of amplifier cascade. Inter-cascade synchronization chain 3 contains two sections of micro-strip line 12,13 and capacitor 14. Both sections of micro-strip line have even length and are positioned in parallel to each other, while capacitor 14 is mounted in the gap between them.

EFFECT: increased stability, decreased unevenness of transfer coefficient in broad range of frequencies.

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