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For the Inventor, By the Inventor

Tsurugashima, Japan

Hiroshi Tanigawa

USPTO Granted Patents = 13

Average Co-Inventor Count = 2.0

ph-index = 6

Forward Citations = 75(Granted Patents)


Location History:

  • Saitama, JP (1988 - 1989)
  • Tsugashima, JP (1993)
  • Tsurugashima, JP (1989 - 2006)

Company Filing History:

goldMedal12 out of 180 
 
Toko, Inc.
 patents
silverMedal1 out of 61 
 
Toko Kabushiki Kaisha
 patents

Years Active: 1988-2006

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13 patents (USPTO):Explore Patents
1. 7057448 - Variable output-type constant current source circuit (2006-06-06),
2. 6927559 - Constant voltage power supply (2005-08-09),
3. 5467045 - Integrator including an offset eliminating circuit and capable of (1995-11-14),
4. 5298813 - Polar leapfrog filter (1994-03-29),
5. 5296763 - Polar leapfrog filter (1994-03-22),
6. 5293086 - Polar leapfrog filter (1994-03-08),
7. 5258716 - All-pass filter (1993-11-02),
8. 5216375 - Variable time-constant type differentiator (1993-06-01),
9. 5182522 - Polar leapfrog filter (1993-01-26),
10. 5177382 - Active filter circuit (1993-01-05),
11. 4814724 - Gain control circuit of current mirror circuit type (1989-03-21),
12. 4808856 - Low voltage phase comparator (1989-02-28),
13. 4767979 - Switching circuit device using current mirror circuits (1988-08-30),

Title: Hiroshi Tanigawa: A Pioneering Inventor in Constant Current Technologies

Introduction

Hiroshi Tanigawa is a notable inventor hailing from Tsurugashima, Japan, who has made significant contributions to the field of electrical engineering. With a total of 13 patents to his name, Tanigawa’s work primarily revolves around innovations in circuits, specifically in the areas of constant current and voltage power supply technologies.

Latest Patents

Among his latest innovative patents, Tanigawa has developed a "Variable Output-Type Constant Current Source Circuit." This circuit design allows for a stepwise variation of output current without complicating the circuit layout or increasing the size of the semiconductor circuit board. It employs a self-biasing type constant current circuit, utilizing transistors strategically for stabilized current generation and adjustable output.

Additionally, he has patented a "Constant Voltage Power Supply," which incorporates an error amplifier that optimizes performance by using a current mirror circuit. This innovative design allows the circuit to balance high-speed response and operational stability, effectively reducing the required area for an integrated circuit.

Career Highlights

Hiroshi Tanigawa’s career has been marked by his work with prominent companies including Toko, Inc. and Toko Kabushiki Kaisha. His engineering expertise has not only led to groundbreaking inventions but also helped in advancing the capabilities of electronic circuits used widely across various industries.

Collaborations

Throughout his career, Tanigawa has collaborated with other talented engineers and inventors, notably Tsuneo Tohyama and Isao Fukai. These partnerships have contributed to the fruitful development and refinement of his various technological innovations.

Conclusion

In conclusion, Hiroshi Tanigawa stands out as an influential figure in the realm of circuit technology, with his innovative patents enhancing the performance and reliability of electrical components. His ongoing contributions reflect a commitment to advancing electrical engineering and inspiring future inventors in the industry.

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