13results about "Amplification control device circuits" patented technology

A continuous time linear equalizer (CTLE), comprising: a first transconductance gain circuit configured to amplify an input voltage signal with a first transconductance gain to generate a first current signal; a second transconductance gain circuit configured to amplify the input voltage signal with a second transconductance gain to generate a second current signal, wherein the second transconductance gain circuit is configured to reuse the first current signal to generate the second current signal; and at least one resistor through which the first current signal and the second current signal flow to generate an output voltage signal.

Certain aspects of the present disclosure relate to a signal processing circuit. The signal processing circuit generally includes: an impedance transformation circuit (404) coupled between a first node and a second node; and an attenuation circuit (402) including a first variable resistive element (408) coupled between the first node and the reference potential node and a second variable resistive element (406) coupled between the second node and the reference potential node.

Certain aspects of the present disclosure are directed towards a signal processing circuit. The signal processing circuit generally includes: an impedance transformation circuit (404) coupled between a first node and a second node; and an attenuation circuit (402) including a first variable resistive element (408) coupled between the first node and a reference potential node, and a second variable resistive element (406) coupled between the second node and the reference potential node.

To provide a variable gain amplifier with relatively low-power by using a relatively small number of components.SOLUTION: A variable gain power amplifying technique in an illustrated example includes: generating (400) a first oscillating signal by using a network of one or more reactive components included in an oscillator; and outputting (402) a second oscillating signal via one or more taps included in the network of the reactive components. The second oscillating signal is proportional to the first oscillating signal and has magnitude less than that of the first oscillating signal. The power amplifying technique further includes: selecting (404) one of the first and second oscillating signals to use for generating a power-amplified output signal; and amplifying (406) the selected one of the first and second oscillating signals to generate the power-amplified output signal.SELECTED DRAWING: Figure 21

The disclosure relates to a current converter circuit (600) for converting a linear input current (lctrl_lin) to an exponential output current (lctrl_sum), the current converter circuit (600) comprising first and second current converters (601, 602), each of which comprises: an input current branch (6031, 6032) with an input current source (6041, 6042) connected in series with a tuning voltage circuit (6051, 6052) and a tuning resistor (6061, 6062) between a supply voltage line (607) and a common voltage line (608); and an output current branch (6091, 6092) with an output transistor (6101, 6102) having a collector connected to an output node (6111, 6112), a emitter connected to the common voltage line (608) and a base connected to the tuning voltage circuit (6051, 6052), wherein the output nodes (6111, 6112) of the first and second current converters (601, 602) are connected to a summing output node (612) of the current converter circuit (600).

A continuous time linear equalizer (CTLE), comprising: a first transconductance gain circuit configured to amplify an input voltage signal with a first transconductance gain to generate a first current signal; a second transconductance gain circuit configured to amplify the input voltage signal with a second transconductance gain to generate a second current signal, wherein the second transconductance gain circuit is configured to reuse the first current signal to generate the second current signal; and at least one resistor through which the first current signal and the second current signal flow to generate an output voltage signal.

A circuit includes a Sallen-Key filter and a programmable gain amplifier coupled to the Sallen-Key filter, the Sallen-Key filter including a source follower implementing a unity gain amplifier. The circuit is capable of implementing a programmable gain that decouples the bandwidth of the circuit from its gain setting via adjustment of a current mirror replication ratio in the programmable gain amplifier. The programmable gain amplifier can include a differential voltage-to-current converter, a current mirror pair, and a programmable output gain stage. At least one leg in the Sallen-Key filter and the programmable gain amplifier can include transistors arranged in the same circuit configuration.

The disclosure relates to a current converter circuit. Example embodiments include a current converter circuit (600) for converting a linear input current (Ictrl_lin) to an exponential output current (Ictrl_sum), the current converter circuit (600) comprising first and second current converters (601, 602), each of which comprises: an input current branch (6031, 6032) with an input current source (6041, 6042) connected in series with a tuning voltage circuit (6051, 6052) and a tuning resistor (6061, 6062) between a supply voltage line (607) and a common voltage line (608); and an output current branch (6091, 6092) with an output transistor (6101, 6102) having a collector connected to an output node (6111, 6112), a emitter connected to the common voltage line (608) and a base connected to the tuning voltage circuit (6051, 6052), wherein the output nodes (6111, 6112) of the first and second current converters (601, 602) are connected to a summing output node (612) of the current converter circuit (600)

A transmission module (30) includes n oscillator modules (50) and a phase command signal generator (40). Each of the oscillator modules (50) includes a voltage controlled oscillator (60) and an amplification circuit (70). The voltage controlled oscillators (60) output transmission high-frequency signals having the same frequency and synchronized among the n oscillator modules (50) by synchronous control based on a common reference signal (Sr). The amplification circuits (70) each perform power amplification for the transmission high-frequency signal from a corresponding one of the voltage controlled oscillators (60) and output the resultant signal. Phases of the transmission high-frequency signals synchronized among the n oscillator modules (50) and output from the voltage controlled oscillators (60) are separately controlled according to respective n phase command signals (ϕ1* to ϕn*) from the phase command signal generator (40).

This invention relates to a variable gain power amplifier. In the described example, the variable gain power amplification technique includes: generating a first oscillation signal (400) using a network of one or more reactive components included in an oscillator; and outputting a second oscillation signal (402) via one or more taps included in the network of reactive components. The second oscillation signal has an amplitude that is proportional to and smaller than that of the first oscillation signal. The power amplification technique further includes selecting one of the first and second oscillation signals to generate a power-amplified output signal (404), and amplifying the selected one of the first and second oscillation signals to generate the power-amplified output signal (406).

A variable gain amplifier includes a differential amplifier circuit having a pair of input terminals and a pair of output terminals, and a first variable attenuation circuit connected between at least one of the pair of input terminals and the pair of output terminals of the differential amplifier circuit and capable of switching a resistance value on the basis of a control signal which is input from the outside.

The present invention provides a transducer protection system and method. A transducer module at least comprises a transducer, and a signal source is used for generating a first signal; a protection module is used for predicting an actual displacement and / or temperature of the transducer according to the first signal, an amplification factor of the power amplifier and built-in transducer parameters to generate a prediction result, comparing the prediction result with a preset value to generate an analysis result, and regulating the first signal to form a second signal according to the analysis result; a power amplifier is used for receiving the second signal, and performing power amplification on the second signal to form a driving signal; and the transducer module is used for receiving the driving signal, and at least one transducer in the transducer module can work according to the driving signal.

An attenuator circuit includes an input / output circuit that is provided at a stage preceding an power amplifier circuit, and a first control circuit that controls a gain of the input / output circuit. The input / output circuit includes at least a first resistor that is electrically connected between an input terminal and an output terminal, and a first FET that is electrically connected between the output terminal and a reference potential point. The first control circuit includes at least a second FET that has an ON resistance that is substantially equal to an ON resistance of the first FET at a time when a gate bias voltage that is the same as a gate bias voltage of the first FET is applied. A gate of the first FET and a gate of the second FET are electrically connected.