Ron Harris (footballer) Ron Harris (footballer) Ronald Edward Harris (born 13 November 1944 in Hackney, London, England), known by the nickname "Chopper", is a former English footballer who played for Chelsea in the 1960s and 1970s. Harris is widely regarded as one of the toughest defenders of his era – along with players such as Tommy Smith and Norman Hunter – hence the nickname. His brother Allan Harris was also a professional footballer and they were teammates at Chelsea in the mid-1960s. Harris was a member of the Chelsea side which won the FA Youth Cup in 1961 and made his senior club
Chopper (electronics) is no drift in input offset voltage with time and temperature). Related techniques that also give these zero-drift advantages are auto-zero and chopper-stabilized amplifiers. Auto-zero amplifiers use a secondary auxiliary amplifier to correct the input offset voltage of a main amplifier. Chopper-stabilized amplifiers use a combination of auto-zero and chopper techniques to give some excellent DC precision specifications. Some example chopper and auto-zero amplifiers are LTC2050, MAX4238/MAX4239 and OPA333. Let's take a general step-up chopper with voltage source formula_2 which is in series with the inductor formula_3, diode and the load with average voltage formula_4. The chopper switch would be