Angle detection apparatus, angle detection system, park lock system, and pedal system

An angle detection apparatus comprising:

• a magnetic detection element;
• a first magnetic field generator magnetized parallel to a first direction and generating a magnetic field to be applied to the magnetic detection element;
• a second magnetic field generator magnetized in a direction opposite to the first direction,
• a first magnetic shield surrounding the magnetic detection element along a plane orthogonal to the first direction;
• and
• a first yoke disposed between the magnetic detection element and the first magnetic field generator in the first direction,
• a second yoke disposed between the magnetic detection element and the second magnetic field generator in the first direction,
• wherein the magnetic detection element and the magnetic field generators are rotatable relative to each other around a rotation axis along the first direction,
• the yokes and the magnetic detection element are rotatable relative to each other around the rotation axis along the first direction,
• in an in-plane direction along the plane orthogonal to the first direction, the magnetic detection element is disposed at a position coinciding with the rotation axis or at a position at a smaller distance from the rotation axis than a distance from the rotation axis to the magnetic field generators,
• the first yoke is positioned to overlap the first magnetic field generator in the first direction,
• the second yoke is positioned to overlap the second magnetic field generator in the first direction, and
• wherein the first yoke includes a portion that increases in dimension in the first direction with increasing distance from the rotation axis along the plane orthogonal to the rotation axis.