MULTIMODE ENVELOPE TRACKING CIRCUIT AND RELATED APPARATUS
First Claim
1. A multimode envelope tracking (ET) circuit comprising:
- a first port configured to be coupled to a first amplifier circuit;
a second port configured to be coupled to a second amplifier circuit;
a first tracker circuit having a first tracker output coupled to the first port;
a second tracker circuit having a second tracker output coupled to the second port;
a switch circuit coupled to the first tracker output and the second tracker output; and
a control circuit configured to control the switch circuit to couple the first tracker output with the second tracker output in response to determining that only a selected amplifier circuit among the first amplifier circuit and the second amplifier circuit is activated.
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Accused Products
Abstract
A multimode envelope tracking (ET) circuit and related apparatus is provided. The multimode ET circuit is configured to provide an ET voltage(s) to an amplifier circuit(s) for amplifying a radio frequency (RF) signal(s) that may correspond to a wider range of modulation bandwidth. In this regard, the multimode ET circuit is configured to switch dynamically and opportunistically between different operation modes based on the modulation bandwidth of the RF signal(s). In examples discussed herein, the multimode ET circuit is configured to support a single amplifier circuit in a high-modulation-bandwidth mode and an additional amplifier circuit(s) in a mid-modulation-bandwidth mode and a low-modulation-bandwidth mode. By switching dynamically and opportunistically between different operation modes, it may be possible to reduce undesired series resonance that may cause distortion in the ET voltage(s), thus helping to improve efficiency and performance of the amplifier circuit(s) supported by the multimode ET circuit.
43 Citations
20 Claims
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1. A multimode envelope tracking (ET) circuit comprising:
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a first port configured to be coupled to a first amplifier circuit; a second port configured to be coupled to a second amplifier circuit; a first tracker circuit having a first tracker output coupled to the first port; a second tracker circuit having a second tracker output coupled to the second port; a switch circuit coupled to the first tracker output and the second tracker output; and a control circuit configured to control the switch circuit to couple the first tracker output with the second tracker output in response to determining that only a selected amplifier circuit among the first amplifier circuit and the second amplifier circuit is activated. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An envelope tracking (ET) amplifier apparatus comprising:
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a first amplifier circuit; a second amplifier circuit; and a multimode ET circuit comprising; a first port coupled to the first amplifier circuit; a second port coupled to the second amplifier circuit; a first tracker circuit having a first tracker output coupled to the first port; a second tracker circuit having a second tracker output coupled to the second port; a switch circuit coupled to the first tracker output and the second tracker output; and a control circuit configured to control the switch circuit to couple the first tracker output with the second tracker output in response to determining that only a selected amplifier circuit among the first amplifier circuit and the second amplifier circuit is activated. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification