Patent ID: 6134452
Filing Date: 2000-10-17
Classification: H03D

Abstract:
A multiple band mixer for a local oscillator, comprising:a first input for communication signals in a first frequency band;a first transistor element coupled to the first input, a first terminal of the first transistor element coupled to receive the communication signals in the first frequency band;a second input for communication signals in a second frequency band;a second transistor element coupled to the second input, a first terminal of the second transistor element coupled to receive the communication signals in the second frequency band;a first filer circuit;a local oscillator, the local oscillator coupled to a second terminal of the first transistor element and a second terminal of the second transistor element through the first filter circuit; anda multiple band mixer output, a third terminal of the first transistor element and a third terminal of the second transistor element coupled to the multiple band mixer output, wherein the first and second transistor elements are coupled to output intermediate frequency signals responsive to communication signals in the first frequency band and the second frequency band.