Back to results
US 2008/0174356 A1Published application
Wave detector circuit
AssigneeMitsubishi Electric Corporation
InventorsKazuya YAMAMOTO, Miyo MIYASHITA, Takayuki MATSUZUKA
Life of this patent
Estimating the term…
Abstract
A wave detector circuit includes: a first transistor having its base and collector connected together, the first transistor receiving an AC signal and a reference voltage at its base and collector; a second transistor having its base connected to the base of the first transistor through a resistance, the second transistor outputting a detected voltage at its collector; and a diode-connected temperature compensation transistor connected between ground potential and the base and the collector of the first transistor.
Claims21
A wave detector circuit comprising:
- a first transistor having a base and a collector connected together, said first transistor receiving an AC signal having a wavelength and a reference voltage at said base and said collector;
- a first resistance;
- a second transistor having a base and a collector, said base being connected to said base of said first transistor through said first resistance, said second transistor outputting a detected voltage at said collector of said second transistor;
- and
- a diode-connected temperature compensation transistor connected between ground potential and said base and said collector of said first transistor.
2 more elements
A wave detector circuit comprising:
- a first transistor having a base and a collector connected together, said first transistor receiving an AC signal and a reference voltage at said base and said collector;
- a resistance;
- a second transistor having a base and a collector, said base being connected to said base of said first transistor through said resistance, said second transistor outputting a detected voltage at Unsaid collector of said second transistor;
- and
- a temperature compensation diode connected between ground potential and said base and said collector of said first transistor.
2 more elements
A wave detector circuit comprising:
- a first transistor having a base and a collector connected together, said first transistor receiving an AC signal and a reference voltage at said base and said collector;
- a resistance;
- a second transistor having a base and a collector, said base being connected to said base of said first transistor through said resistance, said second transistor outputting a detected voltage at said collector of said second transistor;
- a first temperature compensation transistor connected between ground potential and said base and said collector of said first transistor, said first temperature compensation transistor having a base;
- a second temperature compensation transistor having a base and a collector connected together, said base and collector being connected to said base of said first temperature compensation transistor;
- and
- a constant current source for supplying a current to said base and said collector of said second temperature compensation transistor, said constant current source having a positive temperature coefficient.
4 more elements
A wave detector circuit comprising:
- a first transistor having a base and a collector connected together, said first transistor receiving an AC signal and a first reference voltage at said base and said collector;
- a resistance;
- a second transistor having a base and a collector, said base being connected to said base of said first transistor through said resistance, said second transistor outputting a detected voltage at said collector of said second transistor;
- and
- a diode-connected temperature compensation transistor connected between an input terminal for a second reference voltage and said collector of said second transistor.
2 more elements
A wave detector circuit comprising:
- a first transistor having a base and a collector connected together, said first transistor receiving an AC signal and a first reference voltage at said base and said collector;
- a resistance;
- a second transistor having a base and a collector, said base being connected to said base of said first transistor through a first said resistance, said second transistor outputting a detected voltage at said collector of said second transistor;
- and
- a temperature compensation diode connected between an input terminal for a second reference voltage and said collector of said second transistor.
2 more elements
A wave detector circuit comprising:
- a first transistor having a base and a collector connected together, said first transistor receiving an AC signal at said base and said collector;
- first and second resistances;
- a second transistor having a base connected to said base of said first transistor through said first resistance;
- a third transistor having an emitter, a base and a collector said base and said collector being connected together, and said emitter being connected to said collector of said first transistor, said third transistor receiving a reference voltage at said base and said collector of said third transistor;
- a fourth transistor having an emitter, a base, and a collector, said emitter being connected to said collector of said second transistor, and said base being connected to said base of said third transistor through said second resistance, said fourth transistor outputting a detected voltage at said collector of said fourth transistor;
- and
- a diode-connected temperature compensation transistor connected between ground potential and said base and said collector of said third transistor.
4 more elements
A wave detector circuit comprising:
- a first transistor having a base, an emitter, and a collector, said base, and said collector being connected together, said first transistor receiving a reference voltage at said base and said collector;
- a second transistor having an emitter, a base, and a collector aid base and said collector being connected together, and said base and said collector being connected to said emitter of said first transistor, said second transistor receiving an AC signal at is said base and said collector and outputting a detected voltage at said emitter of said second transistor;
- and
- a diode-connected temperature compensation transistor connected between ground potential and said base of said first transistor.
1 more element
A wave detector circuit comprising:
- a first transistor having a base, an emitter, and a collector said base and said collector being connected together, said first transistor receiving a reference voltage at said base and said collector;
- a second transistor having an emitter, a base and a collector said base and said collector being connected together, said base and said collector being connected to an said emitter of said first transistor, said second transistor receiving an AC signal at said base and said collector and outputting a detected voltage at said emitter of said second transistor;
- and
- a temperature compensation diode connected between ground potential and said base and said collector of said first transistor.
1 more element
A wave detector circuit comprising:
- a first transistor having a base, an emitter, and a collector, said base and said collector being connected together, said first transistor receiving a reference voltage at said base and collector;
- a second transistor having an emitter, a base, and a collector, said base and said collector being connected together, said base and said collector being connected to an said emitter of said first transistor, said second transistor receiving an AC signal at said base and said collector and outputting a detected voltage at said emitter of said second transistor;
- a diode-connected first temperature compensation transistor connected between ground potential and said base and said collector of said first transistor and having an emitter;
- and
- a second temperature compensation transistor having a base connected to said base of said first temperature compensation transistor, said second temperature compensation transistor being connected between ground potential and said base and said collector of said first transistor.
2 more elements
Dependencies are inferred from the claim text.