Abstract: A radio frequency circuit includes: an amplifier circuit configured to amplify a first radio frequency signal using a first power supply voltage, and amplify a second radio frequency signal using a second power supply voltage. The first radio frequency signal is a signal in a first band for Long Term Evolution (LTE), the second radio frequency signal is a signal in a second band for 5th Generation New Radio (5G NR) or a wireless local area network (WLAN) signal, and in a state in which a first predetermined condition regarding the first radio frequency signal and the second radio frequency signal is satisfied, a value of the second power supply voltage is greater than a value of the first power supply voltage.

Abstract: A fuel pump attachment structure is provided that includes a cylinder head; a cylinder head cover joined to a top surface of the cylinder head; a bracket mounted to the top surface of the cylinder head so as to be located at a position outside the cylinder head cover; and a fuel pump attached to the bracket. The fuel pump is inserted into an opening formed in the cylinder head cover. A sealing member is arranged between an outer surface of the fuel pump and a surface of the cylinder head cover that defines the opening. Alternatively, a pressing portion is formed in a lower portion of the bracket. The pressing portion presses a pressed portion formed on a periphery of the cylinder head cover from above by means of a bolt that is inserted into the pressing portion and fastened to the cylinder head.

Abstract: A composite member 12, which is formed by integrating an OCV housing 14 and a cylinder head cover 13, is fixed to a cam cap 15 by a bolt 20. The bolt 20 is passed through a bolt insertion hole 16 of the composite member 12 and fastened to the cam cap 15. A step portion 20d is formed in a shank 20c between a head 20a and a threaded rod 20b of the bolt 20. A circumferential groove 21 is formed in the shank 20c between the step portion 20d and the head 20a of the bolt 20. The circumferential groove 21 extends along the outer circumferential surface of the shank 20c. An annular sealing member 22 is fitted in the groove 21. The threaded rod 20b of the bolt 20 is then screwed into the internal thread 19 of the cam cap 15, which is a coupled member. At this time, the step portion 20d of the bolt 20 contacts a contacting portion 16c in the bolt insertion hole 16 of the OCV housing 14. Also, the sealing member 22 contacts the inner circumferential surface of the bolt insertion hole 16 of the cylinder head cover 13.

Abstract: Lock mechanisms are provide between a first case part and a second case part, which are openable and closable. Projections are formed on an outer side surface of the first case part. Each projection has a stopper hole that extends along a circumferential direction of the outer side surfaces of the case parts. U-shaped deformable pieces are formed with the outer side surface of the second case part and each deformable piece can be deformed in a direction perpendicular to the outer side surface of the second case part. A hook portion is formed with a distal portion of each deformable piece. Guide portions are formed at an edge of an entrance of the stopper hole and guide the hook portion toward the stopper hole. Holding portions are formed at an edge of an exit of the stopper hole and hold claw portions of the hook portion.

Abstract: A cylinder head cover is formed by a synthetic resin outer shell, which is molded by inserting a metal valve case, which holds a oil control valve, in a mold. The valve case has a bolt fastening portion for fastening the valve case, together with the outer shell, to the cam cap. The valve fastening portion has a bolt insertion hole. The bolt fastening portion also has a flange that extends radially outward. The flange has through holes. The flange is embedded in the outer shell, and synthetic resin forming the outer shell fills the through holes.

Abstract: A fuel pump attachment structure is provided that includes a cylinder head; a cylinder head cover joined to a top surface of the cylinder head; a bracket mounted to the top surface of the cylinder head so as to be located at a position outside the cylinder head cover; and a fuel pump attached to the bracket. The fuel pump is inserted into an opening formed in the cylinder head cover. A sealing member is arranged between an outer surface of the fuel pump and a surface of the cylinder head cover that defines the opening. Alternatively, a pressing portion is formed in a lower portion of the bracket. The pressing portion presses a pressed portion formed on a periphery of the cylinder head cover from above by means of a bolt that is inserted into the pressing portion and fastened to the cylinder head.

Abstract: An air duct 13 connected to the intake system of an engine 12 has a duct main body 13A and a cylindrical fuel adsorption filter 19 having air permeability. The fuel adsorption filter 19 is located in the duct main body 13A. The fuel adsorption filter 19 is arranged to be coaxial with respect to the duct main body 13A. A gap 21 is defined between the inner circumferential surface of the duct main body 13A and the outer circumferential surface of the fuel adsorption filter 19. An opening 22 for drawing air flow into the gap 21 is formed between an air flow upstream side of the gap 21 and an air passage area of the duct main body 13A.

Abstract: A sealing member 14 has a main seal 15 and a sub seal 21. The sub seal 21 is integrally formed with a first connecting element 20 that extends from the main seal 15. The first connecting element 20 has an upper bent portion 23a and a lower bent portion 23b. The sub seal 21 is at a higher position than the main seal 15 due to the upper and lower bent portions 23a, 23b. The first connecting element 20 has a rib 24 that extends along a longitudinal direction of the first connecting element 20. An upper thick portion 26a and a lower thick portion 26b are formed on the upper bent portion 23a and the lower bent portion 23b of the first connecting element 20, respectively. The rib 24 and the upper and lower thick portions 26a, 26b improve the rigidity of the first connecting element 20.

Abstract: A composite member 12, which is formed by integrating an OCV housing 14 and a cylinder head cover 13, is fixed to a cam cap 15 by a bolt 20. The bolt 20 is passed through a bolt insertion hole 16 of the composite member 12 and fastened to the cam cap 15. A step portion 20d is formed in a shank 20c between a head 20a and a threaded rod 20b of the bolt 20. A circumferential groove 21 is formed in the shank 20c between the step portion 20d and the head 20a of the bolt 20. The circumferential groove 21 extends along the outer circumferential surface of the shank 20c. An annular sealing member 22 is fitted in the groove 21. The threaded rod 20b of the bolt 20 is then screwed into the internal thread 19 of the cam cap 15, which is a coupled member. At this time, the step portion 20d of the bolt 20 contacts a contacting portion 16c in the bolt insertion hole 16 of the OCV housing 14. Also, the sealing member 22 contacts the inner circumferential surface of the bolt insertion hole 16 of the cylinder head cover 13.

Abstract: An air duct 13 connected to the intake system of an engine 12 has a duct main body 13A and a cylindrical fuel adsorption filter 19 having air permeability. The fuel adsorption filter 19 is located in the duct main body 13A. The fuel adsorption filter 19 is arranged to be coaxial with respect to the duct main body 13A. A gap 21 is defined between the inner circumferential surface of the duct main body 13A and the outer circumferential surface of the fuel adsorption filter 19. An opening 22 for drawing air flow into the gap 21 is formed between an air flow upstream side of the gap 21 and an air passage area of the duct main body 13A.

Abstract: A cylinder head cover is formed by a synthetic resin outer shell, which is molded by inserting a metal valve case, which holds a oil control valve, in a mold. The valve case has a bolt fastening portion for fastening the valve case, together with the outer shell, to the cam cap. The valve fastening portion has a bolt insertion hole. The bolt fastening portion also has a flange that extends radially outward. The flange has through holes. The flange is embedded in the outer shell, and synthetic resin forming the outer shell fills the through holes.

Abstract: Lock mechanisms are provide between a first case part and a second case part, which are made of synthetic resin and are openable and closable. Projections are formed on an outer side surface of the first case part. Each projection has a stopper hole that extends along the circumferential direction of the outer side surfaces of the case parts. U-shaped deformable pieces are formed integrally with the outer side surface of the second case part. Each deformable piece can be deformed in a direction perpendicular to the outer side surface of the second case part. A hook portion is integrally formed with a distal portion of each deformable piece. Guide portions formed at the edge of the entrance of the stopper hole. The guide portions guide the hook portion toward the stopper hole. Holding portions are formed at the edge of the exit of the stopper hole. The holding portions hold the claw portions of the hook portion.

Abstract: A sealing member 14 has a main seal 15 and a sub seal 21. The sub seal 21 is integrally formed with a first connecting element 20 that extends from the main seal 15. The first connecting element 20 has an upper bent portion 23a and a lower bent portion 23b. The sub seal 21 is at a higher position than the main seal 15 due to the upper and lower bent portions 23a, 23b. The first connecting element 20 has a rib 24 that extends along a longitudinal direction of the first connecting element 20. An upper thick portion 26a and a lower thick portion 26b are formed on the upper bent portion 23a and the lower bent portion 23b of the first connecting element 20, respectively. The rib 24 and the upper and lower thick portions 26a, 26b improve the rigidity of the first connecting element 20.

Abstract: Providing a wireless communication device that, even if clock stop of a radio frequency part is controlled by a baseband part operating on the same clock signal, can resume clock oscillation, and makes it easy to time the clock reactivation to other operations based on a shared clock. The wireless communication device comprises an RF part generating a first clock signal and a baseband part. The baseband part generates a second clock signal, controls the generation and stop of the first clock signal, uses the first clock signal to perform data processing and a clocking operation, and in a low power consumption state in which the first clock signal is stopped, uses the second clock signal to perform a timer operation and a clocking operation. The generation timing of the first clock signal can be generated by the timer operation using the second clock signal.

Abstract: The invention provides a semiconductor integrated circuit for communication control and a wireless communication system using the same realizing reduction in the size of a chip and the size of a module by enabling trimming data to be written into a nonvolatile memory without increasing the number of external terminals. A rewritable nonvolatile memory is provided in a semiconductor integrated circuit, characteristics of circuits including an electronic part are measured and trimming data for correcting variations in the characteristics is stored in the nonvolatile memory. A pin and an interface circuit such as a test pin and a JTAG interface circuit which are originally provided for the semiconductor integrated circuit also serve as an input pin and an interface circuit for sending and storing the trimming data to the nonvolatile memory.

Abstract: The invention provides a semiconductor integrated circuit for communication control and a wireless communication system using the same realizing reduction in the size of a chip and the size of a module by enabling trimming data to be written into a nonvolatile memory without increasing the number of external terminals. A rewritable nonvolatile memory is provided in a semiconductor integrated circuit, characteristics of circuits including an electronic part are measured and trimming data for correcting variations in the characteristics is stored in the nonvolatile memory. A pin and an interface circuit such as a test pin and a JTAG interface circuit which are originally provided for the semiconductor integrated circuit also serve as an input pin and an interface circuit for sending and storing the trimming data to the nonvolatile memory.

Abstract: Providing a wireless communication device that, even if clock stop of a radio frequency part is controlled by a baseband part operating on the same clock signal, can resume clock oscillation, and makes it easy to time the clock reactivation to other operations based on a shared clock. The wireless communication device comprises an RF part generating a first clock signal and a baseband part. The baseband part generates a second clock signal, controls the generation and stop of the first clock signal, uses the first clock signal to perform data processing and a clocking operation, and in a low power consumption state in which the first clock signal is stopped, uses the second clock signal to perform a timer operation and a clocking operation. The generation timing of the first clock signal can be generated by the timer operation using the second clock signal.

Abstract: A bus driving system includes n bus wires having data signal wires and control signal wires, (n-1) switching circuits constituting driver circuits at a transmitting end, a precharge circuitry for precharging (n-2) bus wires and (n-1)-th bus wire with a control circuit for redistributing wire capacitances of transmission lines formed by the bus wires, and a predischarge circuitry for predischarging n-th bus wire. The switching circuits control conduction and non-conduction between (n-2) bus wires, (n-1)-th bus wire and n-th bus wire, wherein the (n-2) switching circuits respond to (n-2) bit signals and a control signal, while the (n-1)-th switching circuit responds to the control signal. The signal from the transmitting end is detected by a detection circuit at a receiving end via the transmission lines.

Abstract: The present invention contemplates an improved multiplier circuit and method for reducing power consumption by reducing the number of transitions to the input of the multiplier. Each input to the multiplier is fixed for as long as possible by reordering the sequence of the multiplications to take advantage of duplicate input values. The intermediate results of each multiplication are stored in separate accumulators to obtain the final resultants. Power consumption is further reduced through a reduction in the number of transitions on the data bus linking the multiplier and the data register file containing the accumulators.

Abstract: A filter element for an air cleaner including a filter medium which has a plurality of basic filter units and is integrally formed of a porous sintered material produced by sintering powdered synthetic resin.