Local oscillator leak cancellation circuit

Details Local oscillator leak cancellation circuit Local oscillator leak cancellation circuit

H - Electricity

04

B

H04B 1/26 (2006.01) H03C 1/06 (2006.01) H03D 7/00 (2006.01)

Patent

CA 2273671

A method for reducing the level of an undesired signal, generated through a frequency converter device, by implementing a local oscillator (hereinafter "LO") leak cancellation circuit. A feedback correction loop, for a radio frequency (RF) transmitter or receiver, reduces an undesired local oscillator leak generated through a single input frequency converter device, such as a mixer, by a unique detection circuit. A unique nulling circuit is also implemented for a multiple input frequency converter device, such as a quadrature modulator.

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