Low power consumption process-insensitive feedback amplifier

An amplifier comprising:

• a pseudomorphic high electron mobility transistor (PHEMT), the PHEMT having a first port, a second port and a third port, the second port for receiving an input signal for controlling electron flow between the first and third port, the third port for supplying an output signal in response to the input signal;
• a shunt feedback circuit connected between the third port and the second port;
• and
• a series feedback circuit connected between the first port and a predetermined reference potential,
• wherein the shunt feedback circuit includes variable resistance and inductance, the variable resistance for obtaining a predetermined value of resistance, and further wherein the amplifier is implemented as a monolithic microwave integrated circuit (MMIC) and the inductance is a resonator in the form of a U.

An amplifier comprising:

• a plurality of serially connected stages having a first and last stage, each stage including:
• a high electron mobility transistor (HEMT), having a first port (source), a second port (gate) and a third port (drain);
• a shunt feedback circuit connected between the third port and the second port;
• and
• a series feedback circuit connected between the first port and a predetermined reference potential,
• wherein the second port of the first stage for receiving an input signal to be amplified, the third port of the last stage for supplying an amplified signal in response to the input signal, and the third port of the HEMT of each stage other than the last stage connected to the second port of the HEMT of a next serially connected stage.

An amplifier comprising:

• a plurality of serially connected stages having a first and last stage, each stage including:
• a pseudomorphic high electron mobility transistor (PHEMT), having a first port (source), a second port (gate) and a third port (drain);
• a shunt feedback circuit connected between the third port and the second port;
• and
• a series feedback circuit connected between the first port and a predetermined reference potential,
• wherein the second port of the first stage for receiving an input signal to be amplified, the third port of the last stage for supplying an amplified signal in response to the input signal, and the third port of the PHEMT of each stage other than the last stage connected to the second port of the PHEMT of a next serially connected stage.