Amplifier circuits
View Patent ↗Radio Frequency (RF) amplifier circuits are disclosed which may exhibit improved video/instantaneous bandwidth performance compared to conventional circuits. For example, disclosed RF amplifier circuits employ various concepts for reducing an overall circuit inductance or enabling an increase in capacitance for a given circuit size.
1. A radio frequency (RF) amplifier circuit, comprising
a package having a package flange, a conducting ring and a package cover;
an amplifier circuit, directly under the package cover and directly over the package flange, having a RF decoupling capacitance coupled to the conducting ring,
wherein the package cover includes a capacitor having a first electrode and a second electrode, and
wherein the first electrode coupled to the conducting ring which is coupled to the RF decoupling capacitance; and
wherein the second electrode is coupled to the package flange.
2. The RF amplifier circuit of claim 1 , wherein
the capacitor comprises a dielectric layer sandwiched between the first and second electrodes.
3. The RF amplifier circuit of claim 1 , wherein the capacitor covers a majority of a side of the package.
4. The RF amplifier circuit of claim 1 ,
wherein the capacitor is formed to have a capacitance value greater than 0.5 μF.
5. The RF amplifier circuit of claim 1 ,
wherein the capacitor is connected to the RF decoupling capacitance via a plurality of wire bonds.
6. The RF amplifier circuit of claim 1 , further comprising:
a baseband decoupling network connected in parallel with the RF decoupling capacitance.
7. The radio frequency (RF) amplifier circuit of claim 1 :
wherein the capacitor is connected to the RF decoupling capacitance via one or more DC coupling leads.
8. The RF amplifier circuit of claim 7 ,
wherein the one or more DC coupling leads comprise a plurality of parallel wire bonds.
9. An integrated circuit comprising the RF amplifier circuit according to claim 1 .
10. A mobile base station comprising the RF amplifier circuit according to claim 1 .
11. The RF amplifier circuit of claim 1 , wherein the capacitor is connected to the RF decoupling capacitance via a microstrip-like connection.
12. The RF amplifier circuit of claim 4 , wherein the capacitor is formed to have a capacitance value greater than 1 μF.
13. The RF amplifier circuit of claim 12 , wherein the capacitor is formed to have a capacitance value greater than 3 μF.
14. The RF amplifier circuit of claim 12 , wherein the capacitor is formed to have a capacitance value greater than 10 μF.