MOBILE DEVICE FRONT END ARCHITECTURE FOR TIME DIVISION DUPLEXING
First Claim
1. A switching circuit for use in a frequency division duplex (FDD) spectrum re-allocated for time division duplex (TDD) application, the switching circuit comprising:
- a first filter configured to filter a TDD receive signal;
a duplex filter configured to filter an FDD receive signal; and
a plurality of switches configured to route the FDD receive signal from an antenna through the duplex filter to receiver circuitry and to route the TDD receive signal from the antenna through the first filter to the receiver circuitry, the FDD and TDD receive signals sharing the FDD spectrum.
1 Assignment
0 Petitions
Accused Products
Abstract
A switching circuit for use in a frequency division duplex (FDD) spectrum re-allocated for time division duplex (TDD) applications comprises a first filter configured to filter a TDD receive signal, a duplex filter configured to filter an FDD receive signal, and a plurality of switches configured to route the FDD receive signal from an antenna through the duplex filter to receiver circuitry and to route the TDD receive signal from the antenna through the first filter to the receiver circuitry such that the FDD and TDD receive signals share the FDD spectrum.
-
Citations
20 Claims
-
1. A switching circuit for use in a frequency division duplex (FDD) spectrum re-allocated for time division duplex (TDD) application, the switching circuit comprising:
-
a first filter configured to filter a TDD receive signal; a duplex filter configured to filter an FDD receive signal; and a plurality of switches configured to route the FDD receive signal from an antenna through the duplex filter to receiver circuitry and to route the TDD receive signal from the antenna through the first filter to the receiver circuitry, the FDD and TDD receive signals sharing the FDD spectrum. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A switching module for use in a frequency division duplex (FDD) spectrum re-allocated for time division duplex (TDD) application, the switching module comprising:
-
a switching circuit implemented in a first semiconductor die, the switching circuit including a first filter configured to filter a TDD receive signal, a duplex filter configured to filter an FDD receive signal, and a plurality of switches configured to route the FDD receive signal from an antenna through the duplex filter to receiver circuitry and to route the TDD receive signal from the antenna through the first filter to the receiver circuitry, the FDD and TDD receive signals sharing the FDD spectrum; and at least one of a prefilter circuit, a post filter circuit, a power amplifier circuit, a switch circuit, a down converter circuit, and a modulator circuit implemented in a second semiconductor die. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
-
-
16. A method to transmit and receive frequency division duplex (FDD) signals and time division duplex (TDD) signals in an FDD and TDD shared frequency band, the method comprising:
-
routing an FDD receive signal from an antenna to receiver circuitry through a duplex filter configured to filter the FDD receive signal; and routing a TDD receive signal from the antenna to the receiver circuitry through a first filter configured to filter the TDD receive signal, the FDD and TDD receive signals sharing an FDD spectrum. - View Dependent Claims (17, 18, 19, 20)
-
Specification