Receiver with balanced I/Q transformer
First Claim
1. An apparatus comprising:
- a first circuit providing a single-ended signal; and
a transformer coupled to the first circuit and comprisingat least one primary coil receiving the single-ended signal,a first secondary coil magnetically coupled to the at least one primary coil and providing a first differential signal to a second circuit, anda second secondary coil magnetically coupled to the at least one primary coil and providing a second differential signal to a third circuit.
1 Assignment
0 Petitions
Accused Products
Abstract
A receiver with a balanced I/Q transformer is described. In an exemplary design, the receiver includes an LNA that amplifies a received RF signal and provides a single-ended RF signal to the balanced I/Q transformer. The balanced I/Q transformer includes at least one primary coil and first and second secondary coils. The first secondary coil is magnetically coupled to the at least one primary coil and provides a first differential RF signal to a first mixer. The second secondary coil is magnetically coupled to the at least one primary coil and provides a second differential RF signal to a second mixer. The first and second mixers downconvert the first and second differential RF signals with I and Q LO signals, respectively, and provide differential I and Q downconverted signals. The primary and secondary coils may be fabricated on two conductive layers of an integrated circuit.
-
Citations
26 Claims
-
1. An apparatus comprising:
-
a first circuit providing a single-ended signal; and a transformer coupled to the first circuit and comprising at least one primary coil receiving the single-ended signal, a first secondary coil magnetically coupled to the at least one primary coil and providing a first differential signal to a second circuit, and a second secondary coil magnetically coupled to the at least one primary coil and providing a second differential signal to a third circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. An integrated circuit comprising:
-
a low noise amplifier (LNA) amplifying a received radio frequency (RF) signal and providing a single-ended RF signal; and a transformer coupled to the LNA and comprising at least one primary coil receiving the single-ended RF signal, a first secondary coil magnetically coupled to the at least one primary coil and providing a first differential RF signal, and a second secondary coil magnetically coupled to the at least one primary coil and providing a second differential RF signal. - View Dependent Claims (15, 16, 17, 18)
-
-
19. A wireless communication device comprising:
-
an antenna providing a received radio frequency (RF) signal; a low noise amplifier (LNA) amplifying the received RF signal and providing a single-ended RF signal; and a transformer coupled to the LNA and comprising at least one primary coil receiving the single-ended RF signal, a first secondary coil magnetically coupled to the at least one primary coil and providing a first differential RF signal, and a second secondary coil magnetically coupled to the at least one primary coil and providing a second differential RF signal. - View Dependent Claims (20, 21)
-
-
22. A method comprising:
-
generating a single-ended signal with a first circuit; providing the single-ended signal to at least one primary coil of a transformer comprising first and second secondary coils; providing a first differential signal with the first secondary coil magnetically coupled to the at least one primary coil; providing a second differential signal with the second secondary coil magnetically coupled to the at least one primary coil; processing the first differential signal with a second circuit; and processing the second differential signal with a third circuit. - View Dependent Claims (23, 24, 25)
-
-
26. An apparatus comprising:
-
means for generating a single-ended signal; means for providing the single-ended signal to at least one primary coil of a transformer comprising first and second secondary coils; means for providing a first differential signal with the first secondary coil magnetically coupled to the at least one primary coil; providing a second differential signal with the second secondary coil magnetically coupled to the at least one primary coil; means for processing the first differential signal; and means for processing the second differential signal.
-
Specification