Identify chips rf components - Page 1
Forum section: electronics / rf-microwave

author: Mildi
author_rank: Contributor
timestamp: February 02, 2020, 08:16:03 am
content: Hello, friends.Please help identify components from chips photographs.All components are 1985-1995. Produced HP (Avago/Agilent/Keysight)1. Bipolar transistor. The chip and marking is similar to the AT-xxxxx series transistor chip.2. Presumably hemt (phemt) transistor, possibly the ATF-xxxxx series.3. Frequency divider by 4, chip marked IF003.4. RF amplifier, frequency in the region of 12 GHz.5. RF 12GHz to 24GHz frequency doubler, chip marked R179. But maybe this is a fet transistor.I would be grateful for any help in identifying.

author: biastee
author_rank: Regular Contributor
timestamp: February 03, 2020, 07:39:16 am
content: 3. IFD-53010 (5 GHz) or IFD-53011 (3 GHz)1. the AT transistor follows this numbering system: Name = AT + emitter-emitter pitch + # emitter fingers + package codehttp://www.hp.woodshot.com/hprfhelp/products/xrs/bjt_nom.htm

author: Mildi
author_rank: Contributor
timestamp: February 04, 2020, 06:15:05 pm
content: biastee, thanks.3. maybe IFD-53010 or IFD-53011 or IFD-53110 if not packaged.According to the datasheet, they were issued in the 100 mil Stripline Package.I could not find that the chips were not packaged.Perhaps made for internal use.1. AT-414xx contains the same chip as in the photo but with the numbers 414AT-420xx contains the same chip as in the photo but with the numbers 420It can be assumed that the chip labeled 526 should be AT-52600 or AT-526xx series.AT-52600 is not known.All the chips from the photos are on HP hybrid microassemblies.

author: biastee
author_rank: Regular Contributor
timestamp: February 05, 2020, 05:04:26 am
content: 3. Ya. IFD-53010 & IFD-53011 are packaged parts. So, the chip is only for internal use.1. From the photo, I thought the emitter fingers totaled 13. If your microscope can measure dimension, you can determine the emitter-to-emitter pitch, which gives you the first digit of the part no.The hybrid microassembly shown in your photo is part of the 23 GHz transmitter module, DRT1-23xx. Thedetails are here

author: Mildi
author_rank: Contributor
timestamp: February 05, 2020, 10:03:51 am
content: Unfortunately, I cannot do this.My microscope (produced in 1963) does not have such an opportunity, a simple model designed for rural doctors. No micrometer included.True 23 GHz module, but not from DRT1-23xx.It is from a 23 GHz transceiver, ODU DIGITAL MICROWAVE SPECTRUM IIhttp://www.massmicrowave.com/digital-microwave-spectrum-ii/SIM95-1062-002HP p / n 093-484898-002Receiver and transmitter in one housing.The block diagram is similar to DRT1-2321 and DRR1-2321Perhaps the next version after DRT1-2321 and DRR1-2321, or by order DMC.Unfortunately I could not find a photograph of the open DRT1-23xx to compare.

author: biastee
author_rank: Regular Contributor
timestamp: February 06, 2020, 02:31:32 am
content: open DRT1-23xx for comparison

author: Mildi
author_rank: Contributor
timestamp: February 06, 2020, 10:49:08 am
content: Thank you very much!The frequency divider seems to be the same, the output amplifier is different.I compared the sizes of the bandpass filters and the lines in the VCO, the frequency layout in the path should match.Do you have a photo of DRR1-23xx?I would like to compare the receiving part.

author: biastee
author_rank: Regular Contributor
timestamp: February 06, 2020, 02:03:10 pm
content: My version has a single-stage output amplifier. Perhaps yours is the balanced amp version (image below)?Receiver photo attached.

author: Mildi
author_rank: Contributor
timestamp: February 06, 2020, 03:53:33 pm
content: Thank you very much!Photo of my device.The RX part is very similar.In the figure, a block diagram (I painted myself, I could not find the datasheets).It remains to find out what kind of chip (photo 5 in 1 message) is used as a doubler 12-24, at least to understand its scheme.Perhaps it is possible to use it as a harmonics mixer, then can get a good converter for amateur radio.