An integrated passive die includes a substrate, an input node, an output node, and RF filtering circuitry. The RF filtering circuitry includes a number of LC tank circuits coupled between the input node and the output node. Each one of the LC tank circuits include an inductor and a capacitor. The inductor is formed by a metal trace over the substrate. The capacitor is coupled in parallel with the inductor over the substrate. The inductor and the capacitor are provided such that a resonance frequency of the combination of the inductor and the capacitor is less than a self-resonance frequency of the inductor.

A filter circuit includes a coil component, an inductor, and a capacitor. In the coil component, a first coil and a second coil are magnetically coupled. The inductor is electrically connected to a first end of the first coil and a second end of the second coil and is connected in parallel to the coil component. The capacitor is electrically connected between a ground electrode and an electrode electrically connected to a second end of the first coil and a second end of the coil.

A first filter is a hybrid filter including an acoustic wave filter, a plurality of first inductors, and a plurality of first capacitors. A high frequency module further includes a metal electrode layer covering at least part of a resin layer and at least part of an outer peripheral surface of a mounting substrate. Among a plurality of inductors including the plurality of first inductors of the first filter and a plurality of second inductors of a second filter, at least one inductor (the second inductor) is a circuit element including a conductor pattern portion formed in the mounting substrate. The shortest distance between the outer peripheral surface of the mounting substrate and a signal terminal (a third signal terminal) connected to the circuit element is longer than the shortest distance between the outer peripheral surface of the mounting substrate and the circuit element.

A hybrid resonator includes an acoustic wave resonator (AWR) having a piezoelectric material; a first electrical contact, electrically conductively connected to the piezoelectric material; and a second electrical contact, electrically conductively connected to the piezoelectric material. The hybrid resonator further includes a first resonant circuit, electrically conductively connected in series or parallel to the acoustic wave resonator via at least one of the first electrical contact and the second electrical contact. The resonant circuit includes a first inductor, and a first capacitor; wherein, if the first resonant circuit is electrically conductively connected to the acoustic wave resonator in series, the first inductor and the first capacitor are electrically conductively connected to one another in parallel, and if the first resonant circuit is electrically conductively connected to the acoustic wave resonator in parallel, the first inductor and the first capacitor are electrically conductively connected to one another in series.

A wide-bandwidth resonant circuit is provided. In an embodiment disclosed herein, the wide-bandwidth resonant circuit includes a positive resonant circuit coupled in parallel to a negative resonant circuit. The positive resonant circuit and the negative resonant circuit can be configured to collectively exhibit certain impedance characteristics across a wide bandwidth. As a result, it is possible to utilize the wide-bandwidth resonant circuit to support a variety of wide-bandwidth applications, such as in a wide-bandwidth signal filter circuit.

A filter circuit in a radio frequency power detection circuit includes input and output lines, wherein: an input terminal of the input and output lines is connected with a first capacitor, the first capacitor is connected with a first filtering sub-circuit; the first filtering sub-circuit is connected with a third capacitor, the third capacitor is connected with a second filtering sub-circuit; the second filtering sub-circuit is connected with an output terminal of the input and output lines. The filter circuit of the present invention is able to effectively improve the detection accuracy of the radio frequency electric source output power, thereby improving the power output accuracy of the radio frequency electric source.

A filter includes shunt circuits coupled between a reference node and each of an input port, an output port, a first node, and a second node. Resonant networks are coupled between the input port and the second node, and between the first node and the output port. Storage element circuits are coupled between the input port and the first node, and between the second node and the output port. The shunt circuits have an equivalent shunt circuit frequency response that partly defines a high passband frequency of the filter, the resonant networks have an equivalent resonant network frequency response that partly defines a low passband frequency of the filter, and the storage element circuits have an equivalent storage element circuit frequency response that defines a stopband frequency of the filter between the low passband frequency and the high passband frequency.

A multi-bit digital signal that is generated by modulating a baseband signal by a modulation circuit and includes components in a radio frequency band is amplified by switch-mode amplifiers (100-1, 100-2) on a bit-by-bit basis, amplified signals are band-limited by frequency-variable variable band limiting units (201-1, 201-2) and thereafter subjected to voltage-to-current conversion by voltage/current source conversion units (202-1, 202-2) provided with variable capacitances, the signals converted to current are synthesized at a synthesis point X, and a resultant signal is impedance-corrected by an impedance correction unit (203) and output as a transmission signal to an antenna of a load (300). Consequently, the present invention provides a transmitter capable of synthesizing output signals from a plurality of switch-mode amplifiers and transmitting a resultant signal while maintaining an impedance characteristic with respect to a plurality of transmit frequencies without increasing a circuit size.

An electronic component including a body portion and an electrode disposed on the body portion is provided. The electrode includes a first metal layer, a second metal layer, and a third metal layer. The first metal layer contains silver (Ag) as a main component and includes first dispersion portions containing glass as a main component and second dispersion portions containing nickel as a main component. The second metal layer is disposed on the first metal layer and contains nickel (Ni) as a main component. The third metal layer is disposed on the second metal layer and contains tin (Sn) as a main component. An area of the first dispersion portions is larger than an area of the second dispersion portions in a sectional view of the electrode.

A high pass filter includes a first LC series resonator including a first end connected to a signal path, and a second end connected to at least one ground terminal, a second LC series resonator including a third end electrically connected to the signal path, and a fourth end connected to the at least one ground terminal, and a third capacitor between a first portion extending from a first capacitor to a first inductor and a second portion extending from a second capacitor to a second inductor.