Wideband rf amplifiers
AssigneeAnalog Devices, Inc.
InventorsMarc Goldfarb, Edmund J. Balboni
Life of this patent
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Abstract
A device for amplifying signals over a wide frequency range features stacked amplifying modules connected between a DC voltage source and an electrical ground. The stacking configuration reuses the DC current produced the voltage source, and thus reduces the amount of operational DC current permitting the use of lower voltage, higher frequency devices to be used. The amplifying modules are fed signals which are different versions of an input signal, and the output signals are AC coupled using capacitors to balance out gain imbalances and asymmetries between the amplifying modules.
Claims28
An electronic device for amplifying an input signal, the device comprising:
- a first amplifying module for amplifying a first signal to produce a first amplified signal, the first amplifying module being directly connected to a first DC voltage source;
- and
- a second amplifying module for amplifying a second signal to produce a second amplified signal, the second amplifying module being directly connected to an electrical ground;
- wherein the first and second amplifying modules are stacked between the first DC voltage source and the electrical ground.
A method of amplifying an input signal, the method comprising:
- amplifying a first signal to produce a first amplified signal using a first amplifying module, the first amplifying module being directly connected to a first DC voltage source;
- and
- amplifying a second signal to produce a second amplified signal using a second amplifying module, the second amplifying module being directly connected to an electrical ground;
- wherein the first and second amplifying modules are stacked between the first DC voltage source and the electrical ground.
Dependencies are inferred from the claim text.