Rf Magic, Inc.

Raducu Lazarescu

Bert L Fransis

Keith Bargroff

Keith J Rampmeier

Kostas Papathanasiou

Esa Tarvainen

Tony Mellissonos

Donghai Wang

Carl R C De Ranter

Tony Mellissinos

Kosta Papathanasiou

Keith P Bargroff

An N&#xd7;M crosspoint switch allows a signal from any one of the N inputs to be routed to one or more of the M crosspoint switch outputs. The switches within the crosspoint switch can be configured as voltage mode or current mode switches. In voltage mode switching an input to the crosspoint switch is provided to an input device, such as an amplifier, having a low output impedance. The output of the low impedance device is provided to a switch that connects the output of the low impedance device to a high input impedance device, such as a band translation device. In current mode switching, the low impedance output of the input device is connected to selectively activated high isolation transconductance devices having high input impedances. The outputs of the transconductance devices are connected to low impedance devices that operate as summing nodes.

NxM crosspoint switch with band translation

An oscillator circuit includes a tank circuit, first and second oscillator transistors, and a gain-cell tuning inductor. The tank circuit includes first and second ports, and is configured to resonate at one or more predefined frequencies. The first oscillator transistor includes first port, a second port coupled to the first port of the tank circuit, and a third port. The second oscillator transistor includes a first port, a second port coupled to the second port of the tank circuit, and a third port. The gain-cell tuning inductor is coupled between the third ports of the first and second oscillator transistors and is operable to conduct a biasing signal supplied thereto to the third ports of the first and second oscillator transistors.

Oscillator topology for very low phase noise operation

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San Diego, CA, United States of America

Raducu Lazarescu