Narrowband LC folded cascode structure

Details Narrowband LC folded cascode structure Narrowband LC folded cascode structure

1998-09-04

2000-07-25

Kim, Jung Ho

Miscellaneous active electrical nonlinear devices, circuits, and

Specific input to output function

Combining of plural signals

327356, 455326, 455333, G06F 744

Patent

active

060940840

ABSTRACT:
A low voltage cascode frequency conversion mixer circuit is provided. In place of a conventional current source, an LC tank circuit is used. This makes the circuit function as a mixer only over a narrow band of frequencies centred at the resonance frequency of the LC tank circuit. The circuit mixes an input signal with a local oscillator signal. Advantageously, a lower supply voltage may be used because a smaller DC drop exists across the tank circuit than does across conventional current sources. The circuit may also be used as an amplifier by connecting a DC bias voltage in place of the local oscillator.

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