logarithmic amplifier

logarithmic amplifier

[′läg·ə‚rith·mik ′am·plə‚fī·ər]
(electronics)
An amplifier whose output signal is a logarithmic function of the input signal.
References in periodicals archive ?
The logarithmic amplifier (LA) is an effective alternative to the AGC circuit; the logarithmic amplifier refers to an amplifier for which "the gain must be linear until a certain level of the input signal is reached, after which the gain must be unity" [23].
25-||micro~meter~ MESFET process in a HEMT configuration; a successive detection logarithmic amplifier, built in an HBT HEMT process with a 0.
Even though CDMA carriers with equal total power are applied, the experimental results, using a logarithmic amplifier as a detector, have shown nonlinearities as a function of the numbers of carriers and their frequency separation.
Accurate Power Detection of a CDMA Multicarrier Power Amplifier Using a Logarithmic Amplifier," No.
The receiver employs a logarithmic amplifier in the analog baseband to compress the signal dynamic range before the analog-to-digital converter.
The logarithmic amplifier which was the subject of the prototyping activity is based on the use of an anti-parallel diode pair in the feedback loop of the operational amplifier, as shown in Figure 1.
In essence, the demodulating logarithmic amplifier is an RF-to-DC converter.
By virtue of its DC to 500 MHz frequency range and 92 dB dynamic range, the model AD8307 logarithmic amplifier can be used to measure signal strength directly at the IF.
2 quarter-micron HEMT configuration; a successive detection logarithmic amplifier, built-in HBT, HEMT process with 0.
This logarithmic amplifier technique can be extended to frequencies well above 1 GHz by the use of modern monolithic integrated RF amplifiers.
Others include details of practical low noise amplifiers, logarithmic amplifiers and the measurement of receiver noise performance.