WIRELESS DEVICE WITH BUILT-IN SELF TEST (BIST) CAPABILITY FOR TRANSMIT AND RECEIVE CIRCUITS
First Claim
1. An apparatus comprising:
- a first circuit configured to provide a test signal to at least one transmit path, the test signal being electro-magnetically coupled from output of the at least one transmit path to a test signal line; and
a second circuit configured to process a received test signal from the test signal line.
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Accused Products
Abstract
A wireless device with built-in self test (BIST) capability for testing/calibrating transmit and receive circuits is disclosed. In an exemplary design, an apparatus (e.g., a wireless device or an integrated circuit) includes a first circuit and a second circuit. The first circuit (e.g., a transmitter or a mixer) provides a test signal to at least one transmit path. The test signal is electro-magnetically coupled from the output of the at least one transmit path to a test signal line. For example, the test signal may be provided from the at least one transmit path via at least one antenna feed line to at least one antenna element and may be electro-magnetically coupled from the at least one antenna feed line to the test signal line. The second circuit (e.g., a buffer, a receiver, or a mixer) processes a received test signal from the test signal line.
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Citations
26 Claims
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1. An apparatus comprising:
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a first circuit configured to provide a test signal to at least one transmit path, the test signal being electro-magnetically coupled from output of the at least one transmit path to a test signal line; and a second circuit configured to process a received test signal from the test signal line. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method comprising:
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providing a test signal to at least one transmit path; obtaining a received test signal via a test signal line electro-magnetically coupled to output of the at least one transmit path; and processing the received test signal. - View Dependent Claims (19, 20)
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21. An apparatus comprising:
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means for providing a test signal to at least one transmit path; means for obtaining a received test signal via a test signal line electro-magnetically coupled to output of the at least one transmit path; and means for processing the received test signal.
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22. An apparatus comprising:
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a first circuit configured to provide an output radio frequency (RF) signal in a first mode and to provide a test signal to a test signal line in a second mode; and at least one receive path configured to receive the test signal electro-magnetically coupled from the test signal line to input of the at least one receive path. - View Dependent Claims (23, 24, 25)
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26. A method comprising:
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providing an output radio frequency (RF) signal with a first circuit in a first mode; providing a test signal to a test signal line with the first circuit in a second mode; obtaining at least one received test signal via electro-magnetic coupling from the test signal line to input of at least one receive path; and processing the at least one received test signal with the at least one receive path in the second mode.
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Specification