Circuit device, oscillator, electronic apparatus, and vehicle
AssigneeSeiko Epson Corporation
InventorsFumikazu Komatsu, Minoru Kozaki
Life of this patent
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Abstract
A circuit device includes first and second output signal lines from which first and second output signals constituting differential output signals are output, and first to n-th output drivers coupled to the first and second output signal lines. In a first mode, i number of output drivers of the first to n-th output drivers drive the first and second output signal lines based on first and second input signals constituting differential input signals. In a second mode, j number of output drivers of the first to n-th output drivers drive the first and second output signal lines based on the first and second input signals.
Claims20
A circuit device comprising:
- a first output signal line from which a first output signal constituting differential output signals is output;
- a second output signal line from which a second output signal constituting the differential output signals is output;
- and
- first to n-th output drivers for differential input and differential output that are coupled to the first output signal line and the second output signal line, n being an integer of 2 or more, wherein
- in a first mode, i number of output drivers of the first to n-th output drivers drive the first output signal line and the second output signal line based on a first input signal and a second input signal constituting differential input signals, i being an integer of 1≤i≤n,
- in a second mode, j number of output drivers of the first to n-th output drivers drive the first output signal line and the second output signal line based on the first input signal and the second input signal, j being an integer of 1≤j≤n and j≠i, and
- the first to n-th output drivers include
- output drivers of a first group including drive current sources that apply drive currents each having a current value Is, and
- output drivers of a second group including drive current sources that apply drive currents each having a current value a×Is, a being an integer of 2 or more.
A circuit device comprising:
- a first output signal line from which a first output signal constituting differential output signals is output;
- a second output signal line from which a second output signal constituting the differential output signals is output;
- and
- first to n-th output drivers for differential input and differential output that are coupled to the first output signal line and the second output signal line, n being an integer of 2 or more, wherein
- in a first mode, i number of output drivers of the first to n-th output drivers drive the first output signal line and the second output signal line based on a first input signal and a second input signal constituting differential input signals, i being an integer of 1≤i≤n,
- in a second mode, j number of output drivers of the first to n-th output drivers drive the first output signal line and the second output signal line based on the first input signal and the second input signal, j being an integer of 1≤j≤n and j≠i, and
- each output driver of the first to n-th output drivers includes
- a first transistor provided between a node of a power supply at a high potential side and a first node,
- a second transistor provided between the first node and the first output signal line,
- a third transistor provided between the first node and the second output signal line,
- a fourth transistor provided between the first output signal line and a second node,
- a fifth transistor provided between the second output signal line and the second node, and
- a sixth transistor provided between the second node and a node of a power supply at a low potential side.
Dependencies are inferred from the claim text.