RF integrated circuit with tunable component and memory
View Patent ↗An RFIC with memory is described where the memory can be used to house a look-up table for tuning components designed into the RFIC, providing a customized tuning circuit for antenna and transceiver front-end tuning applications. The look-up table can be loaded at wafer level during the manufacturing process to customize an RFIC design for a specific antenna system. The memory can be used to restrict or tailor the tuning range of tunable capacitors and switches within the RFIC to optimize performance in the end application. The resident memory will improve signaling latency when tuning for time critical applications such as channel tuning in a cellular communication system.
1. A radiofrequency integrated circuit (RFIC) module, comprising:
a multi-port switch configured to selectively couple one of a plurality of input ports to a first output port;
a tunable capacitor;
and
a memory cell coupled to each of the multi-port switch and the tunable capacitor, the memory cell including a lookup table containing tunable capacitor range data for limiting the tuning state of the tunable capacitor with respect to each input port of the multi-port switch;
each of the multi-port switch, tunable capacitor and memory being embedded in the RFIC module;
wherein the RFIC module is configured for installation in a wireless communication device.
2. The RFIC module of claim 1 , comprising: a plurality of multi-port switches, a plurality of tunable capacitors, a plurality of memory cells, or a combination thereof.
3. The RFIC module of claim 2 , wherein the tunable capacitor range data comprises capacitive tuning states in the form of a minimum capacitance (C min ) and a maximum capacitance (C max ).
4. The RFIC module of claim 1 , wherein characteristics of the multi-port switch and tunable capacitor are measured and adjustments are stored in the memory cell to compensate for manufacturing variations.
5. The RFIC module of claim 1 , wherein the look-up table resident in the memory cell is configured to store information for the control of a second RFIC.
6. The RFIC module of claim 1 , wherein the data within the memory cell is permanently fixed for preventing changes thereto.
7. The RFIC module of claim 1 , wherein the first output port is configured to couple with an antenna.
8. The RFIC module of claim 7 , wherein said antenna comprises an active antenna system, and wherein the multi-port switch and the tunable capacitor are configured to adjust a tuning state of the active antenna system.
9. The RFIC module of claim 1 , wherein the tunable capacitor is coupled to a second output port that is distinct from the first output port.
10. The RFIC module of claim 1 , wherein the tunable capacitor is coupled to the first output port.
11. An antenna system comprising the RFIC module of claim 1 coupled to an antenna.
12. The antenna system of claim 11 , further comprising:
a second RFIC disposed along the RF path between an RF front end module and the antenna.
13. A radiofrequency integrated circuit (RFIC) module, comprising:
integrated within the RFIC module:
a multi-port switch configured to selectively couple one of a plurality of input ports to a first output port;
a tunable component configured to vary a capacitance or impedance associated therewith; and
a memory cell configured to store a lookup table resident therein, wherein said lookup table comprises first information associated with a plurality of possible tuning states of the multi-port switch and the tunable component;
wherein said RFIC module is configured to couple with a processor, said processor configured to:
access said memory and lookup table resident therein,
select a state from the plurality of possible tuning states of the tunable component based on a selected port of the multi-port switch, and
send a control signal for controlling the tunable component according to the selected state.
14. The RFIC module of claim 13 , comprising a plurality of tunable components.
15. The RFIC module of claim 13 , said processor comprising one of:
a baseband processor or an application processor.
16. The RFIC module of claim 13 , wherein said memory cell is configured with second information associated with a second plurality of possible tuning states of one or more second tunable components integrated within a second RFIC module coupled to said memory cell.
17. The RFIC module of claim 13 , wherein said first information includes, for each port of the multi-port switch, RF characteristics including: insertion loss, return loss, impedance, or a combination thereof.
18. The RFIC module of claim 13 , wherein said tunable component is configured to couple with an antenna.