摘要:
A power amplifier (PA) line-up (210) and a method (500) for more efficiently utilizing battery power are disclosed. PA line-up (210) includes a driver (220), a matching circuit (214), and a PA (230) coupled to a matching circuit (216), wherein matching circuit (216) is configured to be coupled to a filter (260). PA line-up (210) includes a transmission line (260) coupled to matching circuit (216) and a switch (262) configured to selectively couple driver (220) to either matching circuit (214) or matching circuit (216) such that signal (205) is capable of by-passing PA (230) when signal (205) does not need to be amplified by PA (230). Furthermore, PA line-up (210) may include a second transmission line (250) so that signal (205) is capable of by-passing a driver (220) and a PA (230) when signal (205) does not need to be amplified by driver (220) and PA (230).
摘要:
A self-poling piezoelectric based MEMS device is configured for piezoelectric actuation in response to application of a device operating voltage. The MEMS device comprises a beam, a first electrode disposed on the beam, a layer of piezoelectric material having a self-poling thickness disposed overlying a portion of the first electrode, and a second electrode overlying the layer of piezoelectric material. The layer of piezoelectric material is self-poled in response to application of the device operating voltage across the first and second electrodes. In addition, the self-poled piezoelectric material has a poling direction established according to a polarity orientation of the device operating voltage as applied across the first and second electrodes.
摘要:
A circuit includes a micro electro mechanical switch and a detection circuit. The micro electro mechanical switch has a movable portion positioned to form an electrical connection between a first electrical contact and a second electrical contact in response to an electrostatic force provided by a top activation electrode and a bottom activation electrode. The detection circuit is electrically coupled to the top and bottom activation electrodes and is for detecting a first capacitance value between the top and bottom activation electrodes when the movable portion is in a first position and for detecting a second capacitance value when the movable portion is in a second position. By detecting a change in the capacitance, it can be determined if the switch is open or closed.
摘要:
A device 20 includes a substrate 22 coupled with a substrate 24 such that a volume 32 is formed between the substrates 22, 24. Contact posts 48, 50 on the substrate 22 and a cantilever beam structure 36 on the substrate 24 are located within the volume 32. The cantilever beam structure has a conductive trace 38 that is selectively contactable with the contact posts 48, 50 to yield a microelectromechanical (MEMS) switch within the volume 32. Fabrication methodology for making the contact posts 48, 50 entails forming post protrusions 68, 70 on the substrate 22 and shaping post protrusions 68, 70 so that they acquire a rounded shape. Input and output signal lines 42, 44 are constructed such that respective portions of input and output signal lines 42, 44 overly corresponding post protrusions 68, 70 and take on the shape of post protrusions 68, 70.
摘要:
A power amplifier (PA) line-up (210) and a method (500) for more efficiently utilizing battery power are disclosed. PA line-up (210) includes a driver (220), a matching circuit (214), and a PA (230) coupled to a matching circuit (216), wherein matching circuit (216) is configured to be coupled to a filter (260). PA line-up (210) includes a transmission line (260) coupled to matching circuit (216) and a switch (262) configured to selectively couple driver (220) to either matching circuit (214) or matching circuit (216) such that signal (205) is capable of by-passing PA (230) when signal (205) does not need to be amplified by PA (230). Furthermore, PA line-up (210) may include a second transmission line (250) so that signal (205) is capable of by-passing a driver (220) and a PA (230) when signal (205) does not need to be amplified by driver (220) and PA (230).
摘要:
A hybrid antenna switching system in a communications device generally includes an antenna, a first switching device, and a second switching device. The first switching device is configured to selectively couple the antenna to a first set of communication paths within the communications device, wherein the first set of communication paths includes at least one transmit path associated with a first type of wireless communication standard (e.g., a global system for communication (GSM) standard). The second switching device is configured to selectively couple the antenna to a second set of communication paths within the communications device, wherein the second set of communication paths includes at least one reception path associated with the first type of wireless communication standard. The second switching device is a micro-electromechanic system (MEMS) switch integrated with the first switching device on, for example, a common printed circuit board (PCB) or multi-chip module (MCM) substrate.
摘要:
An impedance matching network is integrated on a first die and coupled to a second die, with the first and second dies mounted on a conductive back plate. The impedance matching network comprises a first inductor bridging between the first and second dies, a second inductor coupled to the first inductor and disposed on the first die, and a metal-insulator-metal (MIM) capacitor disposed on the first die. The MIM capacitor has a first metal layer coupled to the second inductor, and a second metal layer grounded to the conductive back plate. A method for manufacturing the integrated impedance matching network comprises the steps of forming an inductor on a die, forming a capacitor on the die, coupling the capacitor to the inductor, coupling the die bottom surface and the capacitor to a conductive plate, and coupling the inductor to another inductor that bridges between the die and another die.
摘要:
A radio frequency (“RF”) circuit configured in accordance with an embodiment of the invention is fabricated on a substrate using integrated passive device (“IPD”) process technology. The RF circuit includes at least one RF signal line section and an integrated RF coupler located proximate to the RF signal line section. The integrated RF coupler, its output and grounding contact pads, and its matching network are fabricated on the same substrate using the same IPD process technology. The integrated RF coupler provides efficient and reproducible RF coupling without increasing the die footprint of the RF circuit.
摘要:
A micro-electro mechanical system (NEMS) device, such as a MEMS switch (100), includes a package seal (104) bonded to a substrate (102), wherein an electrode 106 (e.g., an actuation electrode associated with a switch) is provided on an inner surface (103) of the package seal (104). The MEMS switch (100) might include, for example, a central switch structure implementing a double-pole, single-throw switch using a push-pull arrangement of internal activation electrodes (106, 108). The central switch structure might include a cantilevered moveable actuation electrode (122) or an electrode supported in two or more peripheral regions.
摘要:
A micro-electro mechanical system (MEMS) variable capacitor (varactor) generally includes a substrate (102), a first capacitive plate (112) formed on the substrate, a flexible structure (150) coupled to the substrate, a second capacitive plate (116) and a first electrode (122) formed on the flexible structure; a package seal (104) coupled to the substrate and having a second electrode (106) formed thereon, wherein the distance between the first capacitive plate and the second capacitive plate (and hence, the capacitance of the structure) is responsive to a bias voltage applied to the electrodes.