Bandwidth of HV7802 current monitor? - Page 1
Forum section: electronics / projects

author: ocset
author_rank: Super Contributor
timestamp: November 19, 2017, 04:15:06 pm
content: Hello,Why does the HV7802 datasheet make no statement about its bandwidth?The LTC6101, and all other lower voltage rated current monitors give bandwidth ratingsHV7802 datasheet:http://ww1.microchip.com/downloads/en/DeviceDoc/HV7802%20A062813.pdfLTC6101 datasheet:http://cds.linear.com/docs/en/datasheet/6101fh.pdf

author: fourtytwo42
author_rank: Super Contributor
timestamp: November 21, 2017, 02:22:34 pm
content: It does actually, Tr/f are specified. Why don't you hire an engineer in your place for product design instead of trying to build things like Lego ?

author: ocset
author_rank: Super Contributor
timestamp: November 23, 2017, 06:05:08 am
content: Thanks, we are in the UK, there are no engineers left in the UK.....seriously, there are few engineers left here, few in training, and a Government which is actively pursuing a de-industrialisation policy.....most of the remaining engineers have now given up to become property portfolio managers instead.....here is the story about UK engineering....The number of UK engineers qualifying from uk colleges in electronics in total each year is now less than 300 per year.With a electronics hardware specialisation, the number is less than 70 per year.The suicide of UK owned industry from 1952 to present day (2016):In the early 1950s, the UK was an industrial giant. Today, it is an industrial pygmy. In 1952, UK owned companies made a quarter of the world’s manufacturing exports. Today (2016), the UK makes up less than 2 per cent of the world’s manufacturing exports, and even that percentage is mostly made up from foreign owned companies operating within the UK.The UK now has a National Debt of 1.7 trillion pounds, and has been spending much more than it earns for every year over the 33 years up to 2016, and its trade deficit is dramatically worsening. The supply of North Sea Oil on which UK has become reliant is about to run out. >50% of UK industry is foreign owned; >40% of UK vital services (electricity, gas, infrastructure etc) are foreign owned; >66% of the fuel for the UK economy is foreign owned. UK is not capable of building its own nuclear power stations but relies on China to do it whilst China is already busy building islands just off the coasts of Vietnam, Brunei, Malaysia, Taiwan and Phillipines. >90% of UK schoolchildren stop progressing in maths & science at the age of 16. The OECD recently declared that a quarter of UK’s adults have the maths skills of a 10 year old. The brunt of the UK’s Naval fleet is powered by Electric Motors & Drives designed and built by the French. In the UK in 2016, >70% of London’s ‘zone 1’ office space is foreign owned.The UK’s downward slide is moving at an alarming pace....In 1952, the UK was an industrial powerhouse. In 1952, UK brought out the world’s first commercial airliner, and was a close second to the USA in the development of the computer. In 1956, UK was amongst the first to bring out a Nuclear power station. In the 1950’s, Britain invented nuclear power, led the world in its application and developed enough stations to sustain a sizeable home-grown industry with a strong skills base. In the 1950s, UK owned companies were the second-largest manufacturers of cars in the world (after the United States) and the world’s largest exporter of cars.The UK’s Sir Frank Whittle invented the turbojet engine in the 1930’s. In 1940, the UK had developed a Cavity Magnetron a thousand times more powerful than anything in the USA. The Mini, as developed by the British Motor Corporation in the 1960’s was voted the 2nd most influential car of the 20th century.However, the UK flogged most of Rolls Royce to the Germans, Jaguar Land Rover to India, Bentley to the Germans, Rover to the Germans, Triumph to the Germans, and now has virtually no car industry of its own (Morgan cars have BMW engines). The UK has 25.8 million cars on its roads, and each one represents lots of money flowing overseas, worsening the already disastrous UK trade deficit. The UK cannot blame the arrival of the Far East into the world economy for UK’s poor performance, because after all Germany is managing just fine. In 2014, Germany was the world’s biggest exporter by Capital value.The UK privatised its rail network so as to bring the benefits of private ownership...but then the German government bought a huge chunk of it (Arriva trains)...so its back into state-ownership...but owned by the state of a foreign country. In December 2015, the UK derived 17% of its energy from wind power. In Oct 2016, there were 6594 wind turbines in the UK. None of these wind turbines is designed or manufactured in the UK. Virtually all of them are designed and manufactured by Siemens of Germany or other foreign companies.The UK payed £4.4bn net to the EU in 2009/10, but this rose to £8.8bn in 2014/15....the EU actually took 12.8 billion from UK, but gave back £4bn to be spent in ways decided entirely by the EU. The UK recently flogged off Admiralty Arch (the glorious gateway to Buckingham Palace) and The Old War Office (on Whitehall) to Spain & India respectively, for conversion into Hotels/Flats. In 2002, the UK came up with the "Enterprise Act", freeing its government from the duty of intervention when its own UK owned industries of great value were about to be sold into Foreign ownership...subsequently, from 1997 to 2007, foreign ownership of the UK’s firms rose from a third to a half, and foreign ownership of its vital services (electricity, gas infrastructure etc) rose to 40 per cent. Other countries (eg USA, Germany, France, Spain etc etc) have legislation which stops them from selling off their country’s prized assets in the way that the UK does.Foreign companies acquired £30billion worth of the UK's enterprises in 2009. In 2010, that rose to a value of £54.5 billion. In 2016, the UK flogged off the magnificent ARM company to the Japanese for £24.3 billion, this had been the jewel in the UK's crown, one of the greatest electronics companies in the world. The UK flogged Boots the Chemists to the Italians, and Boots stores remain in the UK, and then the UK found that under Italian ownership, the UK received just £9 million in Tax from Boots, rather than the £90 million per year that it received before flogging it off (due to Boots getting "brass plated" by the Italians to Zug in Switzerland)......The same story of reduced Tax revenue is prevalent with most of the UK's other multitudinous industrial sales to foreign companies. In 2016, the Chief Advisor to the Turkish Prime Minister indicated that all the UK now does is to “Produce Cadbury’s chocolates and Maltesers”. (But in fact, Cadbury’s actually was sold to the Kraft foods company of the USA in 2010). In 2012, Nikolas Sarkozy, Prime Minister of France, declared that “The United Kingdom has no industry any more”. England is the 5th (fifth) most densely populated country in the world.Between 2002 and 2008 the UK suffered a 50% drop in the number of its own domiciled school leavers opting for Electronics/Electrical Engineering degrees. Each year much less than 500 of UK school leavers "enrol" for an electronics degree, the majority of these choose all software modules or transfer to the School of Computer Science at the end of year two. In UK it is virtually impossible for almost anyone to assert the exact number of UK_citizen school leavers that end up actually graduating with an electronics degree each year....As far as Electronics Hardware centred graduates are concerned, the number is thought to be under 100 per year. A paltry amount.When foreign owned companies in UK are a success, the profits flow overseas, when they do less well, there are more likely to be job losses. R&D spending gets notably less when UK industries get sold overseas. Tax revenue to UK is dramatically less. The UK is poorly placed to pay off its huge National Debt, since it has shed the once UK owned Engineering industry so desperately needed to pay off its debt.The UK National Debt of UK is 1.7 trillion pounds in 2016. However, this figure is often “watered down” by expressing it as “National Debt as a percentage of GDP”. This comes out as 90% for UK…hardly a cause for comfort in itself, but in any case, GDP has dubious meaning for a country like UK, where >50% of industry & services are foreign owned. This is partly because for instance, GDP does not take into account profits earned in a nation by overseas companies that are remitted back to foreign investors. This can overstate a country's actual economic output.Like in no other country, Britain has sold off more than half of its companies to Foreign owners (stated by Alex Brummer in book “Britain for Sale”). Nearly two thirds of UK manufacturing businesses that employ over 500 are now owned by foreign companies claimed business minister Baroness Neville-Rolfe in 2016.----------------------------------------------------------------------------------------------------------------------------The UK will be a third world country within a decade.-------------------------------------------------------------------------------------------------------------------------------By the way, thanks, i must have missed the Tr/f details

author: fourtytwo42
author_rank: Super Contributor
timestamp: November 23, 2017, 07:19:42 pm
content: Thank you for your long reply and any interesting figures, I have obviously touched a raw nerve.IMOP industry is heavily to blame for the shortage of engineers by making the job unattractive. British companies tend to laud middle management (who are normally completely non-technical) at the expense of engineers resulting in poor prospects, salaries and standing within the company. I am not at all surprised that young people are not attracted when such a situation has continued for so many decades.

author: ocset
author_rank: Super Contributor
timestamp: November 23, 2017, 07:53:10 pm
content: Thanks, though please may i speak of pay.... im not sure if generally speaking engineering is payed any more in France Germany or USA or NZ or Australia....obviously they have bigger and better engineering jobs so there's more wage money getting pumped in, but generally speaking, i think its pretty similar.Though Germany does have the KfW bank which funds small and medium sized engineering co's, which is good for Germany because otherwise small co's get pushed out by the big corporations.