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US 12,738,938 B2Granted
Pulse transmission circuit, signal transmission device, electronic device, and vehicle
AssigneeRohm Co., Ltd.
InventorsYosuke Yamanaka, Yuji Shimada, Koji Saito
Life of this patent
Estimating the term…
Abstract
For example, a pulse transmission circuit includes: a constant current source configured to generate a constant current; a capacitor configured to be charged using the constant current (e.g., a charge current generated by mirroring the constant current); and a discharge switch configured to pass a discharge current from the capacitor to a transformer according to a pulse edge in an input pulse signal, thereby to pulse-drive the transformer.
Claims8
A pulse transmission circuit comprising:
- a constant current source configured to generate a constant current;
- a capacitor configured to be charged using the constant current;
- a first discharge switch configured, when an input pulse signal rises from low level to high level, to pass a discharge current from the capacitor to a first transformer, thereby to pulse-drive the first transformer;
- a second discharge switch configured, when the input pulse signal falls from high level to low level, to pass a discharge current from the capacitor to a second transformer, thereby to pulse-drive the second transformer;
- a first current holding capacitor configured to store the discharge current that passes when the first transformer is pulse-driven;
- and
- a second current holding capacitor configured to store the discharge current that passes when the second transformer is pulse-driven,
- wherein
- when the first transformer is pulse-driven, electric charge stored in the second current holding capacitor is reused along with electric charge stored in the capacitor, and
- when the second transformer is pulse-driven, electric charge stored in the first current holding capacitor is reused along with the electric charge stored in the capacitor.
7 more elements
A pulse transmission circuit comprising:
- a first constant current source configured to generate a first constant current;
- a first capacitor configured to be charged using the first constant current;
- a first switch configured to pass a first discharge current from the first capacitor to a first transformer when an input pulse signal rises from low level to high level, thereby to pulse-drive the first transformer;
- a second constant current source configured to generate a second constant current;
- a second capacitor configured to be charged using the second constant current;
- and
- a second switch configured to pass a second discharge current from the second capacitor to a second transformer when the input pulse signal falls from high level to low level, thereby to pulse-drive the second transformer.
4 more elements
A pulse transmission circuit comprising:
- a constant current source configured to generate a constant current;
- a capacitor configured to be charged using the constant current;
- a discharge switch configured to pass a discharge current from the capacitor to a transformer according to a pulse edge in an input pulse signal, thereby to pulse-drive the transformer;
- and
- a buffer configured to drive a low-potential node of the capacitor according to charging and discharging operation of the capacitor.
2 more elements
Dependencies are inferred from the claim text.