Oscillation circuit, oscillator, electronic apparatus and moving object

Abstract

An oscillation circuit includes a circuit for oscillation that oscillates a resonator, an output circuit that has a signal, output from the circuit for oscillation, input thereto to thereby output an oscillation signal, a connection terminal to which power is applied, a first wiring that connects from the connection terminal to the output circuit, and a second wiring that is connected to the first wiring through a connection node provided on the first wiring and connects from the connection node to the circuit for oscillation. The circuit for oscillation, the output circuit, the connection terminal, the first wiring, and the second wiring are provided on a semiconductor substrate. The length of a wiring extending from the connection terminal of the first wiring to the connection node is shorter than the length of the second wiring.

What is claimed is: 
     
       1. An oscillation circuit comprising:
 a circuit for oscillation that is connected to a resonator and oscillates the resonator; 
 an output circuit that has a signal, output from the circuit for oscillation, input thereto to thereby output an oscillation signal; 
 a pad to which power is applied; 
 a first wiring that connects from the pad to the output circuit; and 
 a second wiring that is connected to the first wiring at a connection node provided on the first wiring, the second wiring extending from the connection node to the circuit for oscillation, 
 the connection node being disposed at an intersection of the second wiring, a first portion of the first wiring extending from the connection node to the output circuit, and a second portion of the first wiring extending from the connection node to the pad, wherein 
 the circuit for oscillation, the output circuit, the pad, the first wiring, and the second wiring are provided on a semiconductor substrate, 
 a length of the second portion of the first wiring is shorter than a length of the second wiring, the length of the second portion of the first wiring is shorter than a length of the first portion of the first wiring, and the length of the second wiring from the connection node to the circuit for oscillation is longer than a length of the first wiring from the pad to the output circuit. 
 
     
     
       2. The oscillation circuit according to  claim 1 , wherein
 the first wiring has low-pass filter characteristics. 
 
     
     
       3. The oscillation circuit according to  claim 2 , wherein
 the first wiring has a first region and a second region which are separated from each other between the output circuit and the connection node, and 
 wherein the oscillation circuit further comprises an electronic element that electrically connects the first region and the second region. 
 
     
     
       4. An oscillator comprising:
 the oscillation circuit according to  claim 1 ; 
 the resonator; and 
 a container that accommodates the oscillation circuit and the resonator. 
 
     
     
       5. An oscillator comprising:
 the oscillation circuit according to  claim 2 ; 
 the resonator; and 
 a container that accommodates the oscillation circuit and the resonator. 
 
     
     
       6. An oscillator comprising:
 the oscillation circuit according to  claim 3 ; 
 the resonator; and 
 a container that accommodates the oscillation circuit and the resonator. 
 
     
     
       7. An electronic apparatus comprising the oscillation circuit according to  claim 1 . 
     
     
       8. An electronic apparatus comprising the oscillation circuit according to  claim 2 . 
     
     
       9. An electronic apparatus comprising the oscillation circuit according to  claim 3 . 
     
     
       10. A moving object comprising the oscillation circuit according to  claim 1 . 
     
     
       11. A moving object comprising the oscillation circuit according to  claim 2 . 
     
     
       12. A moving object comprising the oscillation circuit according to  claim 3 . 
     
     
       13. The oscillation circuit according to  claim 1 , wherein
 the output circuit includes a heating unit configured such that a direct current to be input is controlled based on operation states of the circuit for oscillation. 
 
     
     
       14. An oscillator comprising:
 a resonator;   a semiconductor circuit device electrically coupled to the resonator and including a semiconductor substrate and an oscillation circuit, the oscillation circuit including:
 a circuit for oscillation that is connected to the resonator and oscillates the resonator; 
 an output circuit that has a signal, output from the circuit for oscillation, input thereto to thereby output an oscillation signal; 
 a pad to which power is applied; 
 a first wiring that connects from the pad to the output circuit; and 
 a second wiring that is connected to the first wiring at a connection node provided on the first wiring, the second wiring extending from the connection node to the circuit for oscillation, the connection node being disposed at an intersection of the second wiring, a first portion of the first wiring extending from the connection node to the output circuit, and a second portion of the first wiring extending from the connection node to the pad; and 
   a container including:
 a first concave portion covered by a lid and configured to accommodate the resonator; and 
 a second concave portion configured to accommodate the semiconductor circuit device, wherein 
   the circuit for oscillation, the output circuit, the pad, the first wiring, and the second wiring are provided on the semiconductor substrate, and   a length of the second portion of the first wiring is shorter than a length of the second wiring, the length of the second portion of the first wiring is shorter than a length of the first portion of the first wiring, and the length of the second wiring from the connection node to the circuit for oscillation is longer than a length of the first wiring from the pad to the output circuit.   
     
     
       15. The oscillator according to  claim 14 , wherein the container further includes an electrode electrically connected to the pad. 
     
     
       16. The oscillator according to  claim 15 , wherein a shortest distance between the electrode and the semiconductor circuit device is shorter than a shortest distance between the electrode and the resonator. 
     
     
       17. The oscillator according to  claim 14 , wherein
 the resonator and the semiconductor circuit device overlap in a first direction,   the container further includes a single container layer disposed between the resonator and the semiconductor circuit device, the single layer including (i) a first surface facing in the first direction and (ii) a second surface opposite to the first surface and facing in a second opposite direction,   the resonator is mounted on the first surface of the single container layer, and   the semiconductor circuit device is mounted on the second surface of the single container layer.   
     
     
       18. The oscillator according to  claim 17 , wherein
 a thickness of the single container layer in the first direction is greater than a thickness of the resonator in the first direction, and   the thickness of the single container layer in the first direction is greater than a thickness of the semiconductor circuit device in the first direction.