{"title":"一种用于脉冲核磁共振光谱的大功率、非调谐射频发射机。","authors":"I J Lowe, C E Tarr","doi":"10.1088/0022-3735/1/6/304","DOIUrl":null,"url":null,"abstract":"A gated radio-frequency transmitter suitable for pulsed nuclear magnetic resonance spectroscopy is described. It has a wide frequency response (3 dB from about 20-50 MHz) and can deliver pulses of greater than 900 v peak to peak into 180 Ω resistive loads with rise and fall times of less than 01 μs. The circuitry described includes a gated radio-frequency mixer-amplifier with two variable phase inputs, and a gated radio-frequency power amplifier. The gating circuits used are d.c. coupled throughout to prevent droop in long pulses and interaction between the pulses.","PeriodicalId":16983,"journal":{"name":"Journal of Scientific Instruments","volume":"2 1","pages":"604-6"},"PeriodicalIF":0.0000,"publicationDate":"1968-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1088/0022-3735/1/6/304","citationCount":"19","resultStr":"{\"title\":\"A high-power, untuned radio-frequency transmitter for pulsed nuclear magnetic resonance spectroscopy.\",\"authors\":\"I J Lowe, C E Tarr\",\"doi\":\"10.1088/0022-3735/1/6/304\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"A gated radio-frequency transmitter suitable for pulsed nuclear magnetic resonance spectroscopy is described. It has a wide frequency response (3 dB from about 20-50 MHz) and can deliver pulses of greater than 900 v peak to peak into 180 Ω resistive loads with rise and fall times of less than 01 μs. The circuitry described includes a gated radio-frequency mixer-amplifier with two variable phase inputs, and a gated radio-frequency power amplifier. The gating circuits used are d.c. coupled throughout to prevent droop in long pulses and interaction between the pulses.\",\"PeriodicalId\":16983,\"journal\":{\"name\":\"Journal of Scientific Instruments\",\"volume\":\"2 1\",\"pages\":\"604-6\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1968-06-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1088/0022-3735/1/6/304\",\"citationCount\":\"19\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Scientific Instruments\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1088/0022-3735/1/6/304\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Scientific Instruments","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1088/0022-3735/1/6/304","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
A high-power, untuned radio-frequency transmitter for pulsed nuclear magnetic resonance spectroscopy.
A gated radio-frequency transmitter suitable for pulsed nuclear magnetic resonance spectroscopy is described. It has a wide frequency response (3 dB from about 20-50 MHz) and can deliver pulses of greater than 900 v peak to peak into 180 Ω resistive loads with rise and fall times of less than 01 μs. The circuitry described includes a gated radio-frequency mixer-amplifier with two variable phase inputs, and a gated radio-frequency power amplifier. The gating circuits used are d.c. coupled throughout to prevent droop in long pulses and interaction between the pulses.
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