A channel selector for a frequency modulation radio frequency receiver, including a band-pass filter, of which the frequency band is centered on the central frequency of the channel to be selected, and has a width that is automatically variable between a minimum value and a maximum value, the minimum value being determined dynamically proportional to a weighted sum of the field level and the modulation level of the channel, according to a formula MinBW=k1C+k2M, in which MinBW is the minimum value, C the field level, k1 the weight associated with the field level, M the modulation level, and k2 the weight associated with the modulation level. The weight associated with the field level is less than the weight associated with the modulation level, preferably in a ratio of 1:3.

A channel selector for a frequency modulation radio frequency receiver, including a band-pass filter, of which the frequency band is centered on the central frequency of the channel to be selected, and has a width that is automatically variable between a minimum value and a maximum value, the minimum value being determined dynamically proportional to a weighted sum of the field level and the modulation level of the channel, according to a formula MinBW=k1C+k2M, in which MinBW is the minimum value, C the field level, k1 the weight associated with the field level, M the modulation level, and k2 the weight associated with the modulation level. The weight associated with the field level is less than the weight associated with the modulation level, preferably in a ratio of 1:3.

A method, apparatus, and system for lessening impact of connected mode mobility measurement is disclosed. A user equipment (UE) may reduce network management complexity by autonomously collecting signal quality measurements for neighboring cells. By autonomously tuning at opportune times for the UE, signal quality measurements may be obtained and reported to a serving cell. In another implementation, the UE examines the broadcast system information of both the serving base station against that of the neighboring base stations. Based on the included bandwidth information, the UE selects appropriate narrowband radio frequency subcarriers to perform signal quality measurement.

A low capacitance n-channel analog switch circuit, a p-channel analog switch circuit, and a full CMOS transmission gate (T-gate) circuit are described. Resistive decoupling can be used to isolate the switch or T-gate from AC grounds, such as one or more switch control signal inputs or supply voltages. A semiconductor region that is separated from a body region of a pass field-effect transistor (FET) can be coupled to or driven to a voltage similar to the input voltage or other desired voltage to help reduce parasitic capacitance of the switch or T-gate. The switch or T-gate can have improved frequency bandwidth or frequency response. The switch can be useful in a programmable gain amplifier (PGA) or programmable gain instrumentation amplifier (PGIA) or other circuit in which excessive switch capacitance could degrade circuit performance.

Disclosed is a frequency characteristic adjusting circuit disposed between an optical circuit element and a drive circuit driving the optical circuit element. The frequency characteristic adjusting circuit includes a capacitor, and two or more series circuits having a resistor and a switch, the two or more series circuits being connected in parallel with the capacitor, where resistance with respect to the switch that is turned on is changed according to an output voltage of the drive circuit by changing ON or OFF of the switch such that electric charge at a contact point between the optical circuit element and the capacitor is adjusted to be constant regardless of the output voltage of the drive circuit.

A channel selector for a frequency modulation radio frequency receiver, including a band-pass filter, of which the frequency band is centred on the central frequency of the channel to be selected, and has a width that is automatically variable between a minimum value and a maximum value, the minimum value being determined dynamically proportional to a weighted sum of the field level and the modulation level of the channel, according to a formula MinBW=k1C+k2M, in which MinBW is the minimum value, C the field level, k1 the weight associated with the field level, M the modulation level, and k2 the weight associated with the modulation level. The weight associated with the field level is less than the weight associated with the modulation level, preferably in a ratio of 1:3.

A channel selector for a frequency modulation radio frequency receiver, including a band-pass filter, of which the frequency band is centred on the central frequency of the channel to be selected, and has a width that is automatically variable between a minimum value and a maximum value, the minimum value being determined dynamically proportional to a weighted sum of the field level and the modulation level of the channel, according to a formula MinBW=k1C+k2M, in which MinBW is the minimum value, C the field level, k1 the weight associated with the field level, M the modulation level, and k2 the weight associated with the modulation level. The weight associated with the field level is less than the weight associated with the modulation level, preferably in a ratio of 1:3.

Systems and methods for providing thermal compensation for amplifiers are described. In some embodiments, an electronic circuit may include a main amplifier and a thermal compensation circuit coupled to the main amplifier, the thermal compensation circuit configured to adjust a gain of the main amplifier at a first range of frequencies relative to the gain of the main amplifier at a second range of frequencies. For example, the thermal compensation circuit may be configured to reduce a self-heating effect within the main amplifier when the main amplifier is in operation, such that the first range of frequencies is lower than the second range of frequencies.

Systems and methods for providing thermal compensation for amplifiers are described. In some embodiments, an electronic circuit may include a main amplifier and a thermal compensation circuit coupled to the main amplifier, the thermal compensation circuit configured to adjust a gain of the main amplifier at a first range of frequencies relative to the gain of the main amplifier at a second range of frequencies. For example, the thermal compensation circuit may be configured to reduce a self-heating effect within the main amplifier when the main amplifier is in operation, such that the first range of frequencies is lower than the second range of frequencies.

An apparatus configured to apply equalization to an input data signal and detect data based on the equalized data signal. The apparatus includes a passive equalizer comprising a first signal path configured to generate a first signal based on an input signal, and a second signal path configured to generate a second signal by filtering the input signal. The apparatus further includes a sense amplifier having an input circuit configured to generate a third signal related to a combination of the first and second signals, and a data detection circuit configured to generate data based on the third signal. The data detection circuit may be configured as a strong-arm latch. The third signal may be a differential current signal including positive and negative current components. The strong-arm latch generating data based on whether the positive current component is greater than the negative current component.