Wireless Transmitters
First Claim
1. A transmitter circuit comprising:
- an active filtering-and-amplifying component comprising;
a first input configured to receive a first input signal, anda first output configured to output a first output signal;
a passive filtering component comprising;
a second input connected to the first output and configured to receive the first output signal,a passive pole arrangement comprising a number of switchable resistance elements and a capacitance element connected across the plurality of switchable resistance elements, anda second output configured to output a second output signal having reduced noise as compared to the first output signal; and
a number of feedback loops connecting the passive filtering component to the first input.
2 Assignments
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Accused Products
Abstract
Transmitter circuits for generating baseband signals having low receiver-band noise are disclosed. In one embodiment, the transmitter circuit comprises an active filtering-and-amplifying component comprising a first input configured to receive a first input signal, and a first output configured to output a first output signal. The transmitter circuit further comprises a passive filtering component comprising a second input connected to the first output and configured to receive the first output signal, a passive pole arrangement comprising a number of switchable resistance elements and a capacitance element connected across the plurality of switchable resistance elements, and a second output configured to output a second output signal having reduced noise as compared to the first output signal. The transmitter still further comprises a number of feedback loops connecting the passive filtering component to the first input.
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Citations
20 Claims
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1. A transmitter circuit comprising:
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an active filtering-and-amplifying component comprising; a first input configured to receive a first input signal, and a first output configured to output a first output signal; a passive filtering component comprising; a second input connected to the first output and configured to receive the first output signal, a passive pole arrangement comprising a number of switchable resistance elements and a capacitance element connected across the plurality of switchable resistance elements, and a second output configured to output a second output signal having reduced noise as compared to the first output signal; and a number of feedback loops connecting the passive filtering component to the first input. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A transceiver comprising:
a number of transmitter circuits, each transmitter circuit comprising; an active filtering-and-amplifying component comprising; a first input configured to receive a first input signal, and a first output configured to output a first output signal; a passive filtering component comprising; a second input connected to the first output and configured to receive the first output signal, a passive pole arrangement comprising a number of switchable resistance elements and a capacitance element connected across the plurality of switchable resistance elements, and a second output configured to output a second output signal having reduced noise as compared to the first output signal; and a number of feedback loops connecting the passive filtering component to the first input. - View Dependent Claims (15, 16, 17, 18)
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19. An integrated circuit comprising:
a transceiver comprising; a number of transmitter circuits, each transmitter circuit comprising; an active filtering-and-amplifying component comprising; a first input configured to receive a first input signal, and a first output configured to output a first output signal; a passive filtering component comprising; a second input connected to the first output and configured to receive the first output signal, a passive pole arrangement comprising a number of switchable resistance elements and a capacitance element connected across the plurality of switchable resistance elements, and a second output configured to output a second output signal having reduced noise as compared to the first output signal; and a number of feedback loops connecting the passive filtering component to the first input. - View Dependent Claims (20)
Specification