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DA-6012S42NB Datasheet(PDF) 1 Page - American Accurate Components, Inc. |
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DA-6012S42NB Datasheet(HTML) 1 Page - American Accurate Components, Inc. |
1 / 4 page Detector Log Video Amplifiers (DLVA) The content of this specification may change without notification7/01/09 188 Technology Drive, Unit H, Irvine, CA 92618 Tel: 949-453-9888 Fax: 949-453-8889 Email: sales@aacix.com 1 American Accurate Components, Inc. DLVA Detector Log Video Amplifiers (DLVA) There are three basic types of logarithmic amplifiers, Detector-Log Video Amplifiers (DLVAs) Successive Detection Logarithmic Amplifiers True Log Amplifiers (TLAs) A detector log video amplifier (DLVA) is a type of logarithmic amplifier in which the envelope of the input RF signal is detected by a standard "linear" diode detector. The output of the detector is compressed in the video amplifier section, making input/output relationship similar to a logarithmic conversion. In general, the DLVA offers the advantage of operating over the widest frequency range, but at the sacrifice of dynamic range. Limited by the detecting range of square law of the input diode detector, typical dynamic range for a DLVA is approximately 40 dB. In quite a lot of usages, two log cascades are put in parallel with a RF amplifier incorporated in time of detection of the log cascade, so that the dynamic range can be extended to approx.70dB. The detected video sections of a DLVA can either be AC coupled, DC coupled, or pseudo DC coupled. Each has its advantages, depending upon the application (i.e., CW operation, temperature compensation, etc.). The basic configuration of a DLVA is simply a detector diode to convert the RF energy into a DC voltage followed by a video amplifier with a logarithmic transfer function. The combination results in a device which compresses a large RF signal range into a narrow range of video voltage. We have put considerable effort into designing a DC coupled DLVA with very low baseline drift. Employing a tunnel diode based detector circuit coupled with a very stable DLVA, high-speed miniature DC DLVA with good recovery characteristics is available. Features Advanced Microwave Hybrid Integrated Circuits Technology Frequency Range from 0.5 to 18GHz Superior Log Linearity Wide Dynamic Range Wide Bandwidth Low Current Consumption DC-Coupled DLVAs High Performance High Reliability High Repeatability Compact Size And Light Weight Custom Design Available Applications Radar Systems Navigation Systems Laboratory Measurement And Test Equipment Telecommunications And Data Communications Military And Instrumentation Systems Other Commercial Applications |
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