Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – With electromagnetic field
Patent
1991-09-13
1994-05-10
Strecker, Gerard R.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
With electromagnetic field
307261, 307519, 307520, 324 7639, 324146, 324166, 328165, G01R 514, G01R 3481, G01R 2306, H03K 519
Patent
active
053111184
ABSTRACT:
A frequency-to-voltage converter comprises a pulse generator, an integrator, an inverting amplifier, and a superimposing circuit. The pulse generator generates a pulse signal having a predetermined width. The integrator integrates and outputs the pulse signal. The inverting amplifier reverses the ripple component of the output of the integrator, outputting the reversed ripple component. The superimposing circuit superimposes the reversed ripple component on the output of the integrator. An automobile meter according to this invention comprises a frequency-to-voltage converter, a plurality of driving signal generators, and a plurality of pointer driving coils. The drive signal generators generate driving signals having values according to the output value of the integrator, applying the drive signals to pointer driving coils.
REFERENCES:
patent: 3875539 (1975-04-01), Fendrich, Jr.
patent: 3893014 (1975-07-01), Vacek
patent: 4594648 (1986-06-01), Gallios
patent: 4682369 (1987-07-01), Schrader
patent: 4890057 (1989-12-01), Kobayashi et al.
Rohm & Co., Ltd.
Strecker Gerard R.
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