Radio frequency front end with differential paths
A radio frequency circuit assembly architecture is disclosed. An example radio frequency circuit assembly architecture comprises a signal contact and an antenna contact, a power amplifier module connected in a signal path between the signal contact and the antenna contact, the signal path between the power amplifier module and the antenna contact including a differentially signaled portion having a first path and a second path, and a pair of band pass filters, a first band pass filter of the pair of band pass filters being connected in the first path of the differentially signaled portion and a second band pass filter of the pair of band pass filters being connected in the second path of the differentially signaled portion.
1 . A radio frequency circuit assembly, comprising:
a signal contact and an antenna contact;
an amplifier connected in a signal path between the signal contact and the antenna contact, the signal path between the amplifier and the antenna contact including a differentially signaled portion having a first path and a second path; and
a pair of band pass filters, a first band pass filter of the pair of band pass filters being connected in the first path of the differentially signaled portion and a second band pass filter of the pair of band pass filters being connected in the second path of the differentially signaled portion, the first band pass filter and the second band pass filter being acoustic wave filters.
2 . The radio frequency circuit assembly of claim 1 wherein the first band pass filter and the second band pass filter are coupled to form a differential filter.
3 . The radio frequency circuit assembly of claim 1 wherein the amplifier is a single ended amplifier.
4 . A radio frequency circuit assembly, comprising:
a signal contact and an antenna contact;
an amplifier connected in a signal path between the signal contact and the antenna contact, the signal path between the amplifier and the antenna contact including a differentially signaled portion having a first path and a second path;
a pair of band pass filters, a first band pass filter of the pair of band pass filters being connected in the first path of the differentially signaled portion and a second band pass filter of the pair of band pass filters being connected in the second path of the differentially signaled portion; and
an antenna switch module connected in the signal path between a single ended output of the differentially signaled portion and the antenna contact.
5 . The radio frequency circuit assembly of claim 4 wherein the first band pass filter and the second band pass filter are acoustic wave filters.
6 . The radio frequency circuit assembly of claim 1 wherein the amplifier is a differential amplifier.
7 . A radio frequency circuit assembly, comprising:
a signal contact and an antenna contact;
an amplifier connected in a signal path between the signal contact and the antenna contact, the signal path between the amplifier and the antenna contact including a differentially signaled portion having a first path and a second path, the amplifier being a differential amplifier;
a pair of band pass filters, a first band pass filter of the pair of band pass filters being connected in the first path of the differentially signaled portion and a second band pass filter of the pair of band pass filters being connected in the second path of the differentially signaled portion; and
a pair of band select switches coupled to respective differential outputs of the differential amplifier.
8 . The radio frequency circuit assembly of claim 1 further comprising a pair of antenna switch modules each coupled to the antenna contact and to a respective output of the first band pass filter and the second band pass filter.
9 . The radio frequency circuit assembly of claim 1 further comprising a tunable low pass filter connected in the signal path between a single ended output of the differentially signaled portion and the antenna contact.
10 . A front-end module comprising:
a signal contact and an antenna contact;
an amplifier connected in a signal path between the signal contact and the antenna contact, the signal path between the amplifier and the antenna contact including a differentially signaled portion having a first path and a second path;
a pair of band pass filters, a first band pass filter of the pair of band pass filters being connected in the first path of the differentially signaled portion and a second band pass filter of the pair of band pass filters being connected in the second path of the differentially signaled portion; and
a pair of antenna switch modules each coupled to the antenna contact and to a respective output of the first band pass filter and the second band pass filter.
11 . The front-end module of claim 10 wherein the first band pass filter and the second band pass filter are coupled to form a differential filter.
12 . The front-end module of claim 10 wherein the first band pass filter and the second band pass filter are acoustic wave filters.
13 . The front-end module of claim 10 wherein the amplifier is a single ended amplifier.
14 . The front-end module of claim 10 wherein the amplifier is a differential amplifier.
15 . The front-end module of claim 14 further comprising a pair of band select switches coupled to respective differential outputs of the differential amplifier.
16 . A front-end module comprising:
a signal contact and an antenna contact;
an amplifier connected in a signal path between the signal contact and the antenna contact, the signal path between the amplifier and the antenna contact including a differentially signaled portion having a first path and a second path;
a pair of band pass filters, a first band pass filter of the pair of band pass filters being connected in the first path of the differentially signaled portion and a second band pass filter of the pair of band pass filters being connected in the second path of the differentially signaled portion;
a pair of band select switches coupled to respective outputs of the amplifier; and
a pair of antenna switch modules, the pair of band pass filters being coupled to respective outputs of the pair of band select switches, the pair of antenna switch modules being coupled to the respective outputs of the pair of band pass filters, and the pair of antenna switch modules being coupled to the antenna contact.
17 . The front-end module of claim 10 further comprising a tunable low pass filter connected in the signal path between a single ended output of the differentially signaled portion and the antenna contact.
18 . The radio frequency circuit assembly of claim 5 wherein the amplifier is a differential amplifier.
19 . The radio frequency circuit assembly of claim 1 further comprising an antenna switch module connected in the signal path between a single ended output of the differentially signaled portion and the antenna contact.
20 . The radio frequency circuit assembly of claim 5 wherein the first band pass filter and the second band pass filter are coupled to form a differential filter.