There is provided mechanisms for automatic gain control in a wireless communication network for power grid control. The wireless communication network employs time based scheduling of packets. A method is performed by a packet receiver in the wireless communication network. The method comprises receiving a packet from a packet transmitter. The packet comprises a preamble. The preamble is composed of a single OFDM symbol. The preamble is represented by a sequence of samples. The method comprises applying automatic gain control to the sequence of samples after variable gain amplitude control has been applied to the sequence of samples. The automatic gain control involves applying an LPF to the sequence of automatic gain controlled samples. The LPF is selected from a bank of LPSs. Which LPF to apply depends on, according to the time based scheduling, from which packet transmitter the packet is received.

In an operating method of a radio frequency integrated circuit (RFIC) including a transmission circuit and a reception circuit, the operating method includes receiving, from a modem, first information for setting transmission power of the transmission circuit or second information about a blocker which is a frequency signal unused by the RFIC, obtaining an allowable value of phase noise of a local oscillator included in the transmission circuit, using the first information, obtaining an allowable value of phase noise of a local oscillator included in the reception circuit, using the second information, determining a level of a driving voltage, using the obtained allowable values of the phase noises, and providing the driving voltage to the local oscillators.

A power efficient (PE) amplifier includes a cascode amplifier, a transistor amplifier, and a voltage supply. The transistor amplifier includes at least one differential pair of transistors and a plurality of transformers having a primary winding and a tapped secondary winding. The secondary winding is connected across emitters or sources of each transistor pair. The tap of each secondary has a current source. The primary windings of the plurality of transformers are connected in series. The transistor bases or gates are alternating current (AC) grounded. The collector or drain terminal pairs are connected in parallel. The voltage supply is low voltage and supplies a current to the cascode amplifier. The PE amplifier further includes a plurality of current sources which provide a total current to the transistor amplifier. The PE amplifier has, among other things, improved power gain, improved reverse isolation, improved power dissipation, and improved peak differential swing.

Temperature compensation circuits and methods for adjusting one or more circuit parameters of a power amplifier (PA) to maintain approximately constant Gain versus time during pulsed operation sufficient to substantially offset self-heating of the PA. Some embodiments compensate for PA Gain droop due to self-heating using a Sample and Hold (S&H) circuit. The S&H circuit samples and holds an initial temperature of the PA at commencement of a pulse. Thereafter, the S&H circuit generates a continuous measurement that corresponds to the temperature of the PA during the remainder of the pulse. A Gain Control signal is generated that is a function of the difference between the initial temperature and the operating temperature of the PA as the PA self-heats for the duration of the pulse. The Gain Control signal is applied to one or more adjustable or tunable circuits within a PA to offset the Gain droop of the PA.

A vehicle includes an antenna configured to receive a broadcast signal, an amplifier configured to amplify the broadcast signal, a detector configured to detect an output signal of the amplifier, a variable transformer configured to output a negative feedback signal based on the detected output signal, an auto gain control configured to control an input signal of the amplifier based on the negative feedback signal and a controller configured to control the variable transformer and the auto gain control based on the output signal of the amplifier.

A receiver front-end includes a first variable-gain amplifier that performs attenuation; a continuous time linear equalizer coupled to the input or output of the first variable-gain amplifier, wherein a combination of the first variable-gain amplifier and the continuous time linear equalizer produces a processed signal; a plurality of track-and-hold circuits that sample the processed signal in an interleaved manner; and a plurality of second variable-gain amplifiers receiving input signals from the plurality of track-and-hold circuits respectively.

The present invention is directed to communication systems and electrical circuits. More specifically, an embodiment of the present invention provides a termination circuit that includes a programmable gain attenuation section, a T-coil section, and a termination resistor. The characteristic resistance of the programmable gain attenuation section matches the resistance of the termination resistor. There are other embodiments as well.

A high-frequency amplifier circuit has a source-grounded first transistor that amplifies a high-frequency input signal, a gate-grounded second transistor that further amplifies the amplified signal, a first inductor and a first reference voltage node, a second inductor connected between a first node and a second reference voltage node, a third transistor that is connected between the first node and a drain of the second transistor, is turned on at the time of selecting the first mode to transmit the amplified signal to the first node, and is turned off when selecting a second mode to disconnect the first node from the drain of the second transistor, a bypass path that bypasses the high-frequency input signal from an input node of the high-frequency input signal to the first node at the time of selecting the second mode, and a bypass switching circuit that is connected on the bypass path.

A programmable gain amplifier includes a first gain stage having a first bias current path and a first intermediate node, a second gain stage having a second bias current path and a second intermediate node, a third gain stage having a third bias current path and a third intermediate node, a fourth gain stage having a fourth bias current path and fourth intermediate node, a first resistor coupled between the first intermediate node and the second intermediate node, and a second resistor coupled between the third intermediate node and the fourth intermediate node.

A system, method and apparatus for simultaneously minimizing power and latency in a scan for advertisement packets from one or more peripheral devices in a Bluetooth Low Energy (BLE) frequency band having a number of advertisement channels. A receiver front end receives BLE signals, and a local oscillator (LO) generator has an output frequency that is sequentially tuned to a frequency of each of the advertisement channels. An energy detector monitors signal energy on each of the advertisement channels in sequence, and when the signal energy exceeds a threshold, fixes the output frequency of the LO generator to that advertisement channel. An automatic gain controller controls a gain of the signal on the one of the plurality of advertisement channels to generate a controlled gain signal, and a correlator correlates the controlled gain signal with an advertisement packet on the one of the advertisement channels.