Wide-band cascode vhf amplifier utilizing inherent transistor reactance

Claim 1

A WIDE-BAND CASCODE AMPLIFIER COMPRISING FIRST AND SECOND AMPLIFYING DEVICES, EACH OF SAID AMPLIFYING DEVICES HAVING FIRST AND SECOND ELECTRODES AND A CONTROL ELECTRODE, SAID CONTROL ELECTRODES BEING RESPONSIVE TO SIGNAL VOLTAGES TO CONTROL THE CURRENT FLOW BETWEEN SAID RESPECTIVE FIRST AND SECOND ELECTRODES, A SOURCE OF DIRECTCURRENT VOLTAGE, A SIGNAL INPUT TERMINAL CONNECTED TO THE CONTROL ELECTRODE OF SAID FIRST AMPLIFYING DEVICE, A CAPACITIVE AND RESISTIVE NETWORK CONNECTED BETWEEN ONE TERMINAL OF SAID SOURCE AND SAID FIRST ELECTRODE OF SAID FIRST AMPLIFYING DEVICE, SAID NETWORK BEING RESONANT WITH THE INHERENT INDUCTANCES OF SAID FIRST ELECTRODES OF SAID FIRST AMPLIFYING DEVICE TO PROVIDE GAIN AT DESIRED FREQUENCIES OF SIGNAL APPLIED TO SAID INPUT, SAID NETWORK ALSO CONDUCTING OPERATING VOLTAGES FROM SAID SOURCE TO SAID AMPLIFYING DEVICES, THE SECOND ELECTRODE OF SAID FIRST AMPLIFYING DEVICE BEING CONNECTED TO THE FIRST ELECTRODE OF SAID SECOND AMPLIFYING DEVICE FOR CONNECTING SAID FIRST AND SECOND ELECTRODES OF SAID AMPLIFYING DEVICES IN SERIES, AN IMPEDANCES DEVICE CONNECTED BETWEEN SAID SECOND ELECTRODE OF SAID SECOND AMPLIFYING DEVICE AND THE OTHER TERMINAL OF SAID SOURCE, AN OUTPUT TERMINAL CONNECTED TO SAID IMPEDANCE DEVICE, A CAPACITOR AND A RESISTOR CONNECTED IN SERIES DIRECTLY BETWEEN THE FIRST ELECTRODE OF SAID FIRST AMPLIFYING DEVICE AND THE CONTROL ELECTRODE OF SAID SECOND AMPLIFYING DEVICE AND EXTERNALLY TO SAID FIRST AND SECOND AMPLIFYING DEVICES, SAID CAPACITOR AND SAID RESISTOR RESONATING THE INHERENT INDUCTANCES OF SAID ELECTRODE CIRCUITS TO WHICH THEY ARE CONNECTED AND COUPLING SIGNAL ENERGY FROM SAID FIRST ELECTRODE OF SAID FIRST AMPLIFYING DEVICE TO THE CONTROL ELECTRODE OF SAID SECOND AMPLIFYING DEVICE TO PROVIDE SUBSTANTIAL GAIN OF SAID CASCODE AMPLIFIER OVER A RANGE OF SIGNAL THAT HAS HIGHER FREQUENCIES THAN COULD BE REALIZED WITHOUT THE CONNECTION OF SAID RESISTOR AND SAID CAPACITOR.