Baseband signal input current splitter
First Claim
Patent Images
1. A circuit, comprising:
- a current splitter structured to receive a current input signal received at a radio circuit from a baseband circuit and to apportion different proportions of the current input signal concurrently between multiple paths of the same polarity having respective load circuits, the multiple paths including at least one multiple mixer path and a dummy load circuit, and a voltage-to-current converter structured to convert a voltage input signal to the current input signal.
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Abstract
A current steering mechanism is provided in a radio transmitter (e.g., a multiband radio transmitter) to provide compatibility with a variety of baseband parts. Different proportions of an input signal current (“in”) are steered to a dummy load, a mixer for a first band, and at least one other mixer for a second band. The mechanism is structured to selectively apportion a current input signal between multiple paths of the same polarity having respective load circuits and concurrently steer different proportions of the current input signal to a dummy load path and at least one mixer path.
24 Citations
20 Claims
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1. A circuit, comprising:
- a current splitter structured to receive a current input signal received at a radio circuit from a baseband circuit and to apportion different proportions of the current input signal concurrently between multiple paths of the same polarity having respective load circuits, the multiple paths including at least one multiple mixer path and a dummy load circuit, and a voltage-to-current converter structured to convert a voltage input signal to the current input signal.
- View Dependent Claims (2, 3, 4, 5)
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6. A circuit, comprising:
- a current splitter structured to selectively apportion different proportions of a current input signal between multiple paths of the same polarity having respective load circuits that include a dummy load path and at least one mixer path.
- View Dependent Claims (7, 8, 9, 10)
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11. A circuit for interfacing a baseband portion and a radio portion of a radio transmitter, comprising:
a current steering circuit structured to perform the following method; receiving at the radio portion a current signal from the baseband portion; and selectively apportioning different proportions of the current signal between multiple paths of the same polarity having respective load circuits that include at least one multiple mixer path and a dummy load. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
Specification