# US 7,612,590 B2 · Oscillating apparatus

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 7,612,590 B2
- Document ID: US7612590B2
- Status: Granted
- Kind: B2
- Application number: 12/257,401
- Filed: 2008-10-24
- Published: 2009-03-26
- Granted: 2009-11-03
- Earliest claimed: 2005-03-23
- Assignees: Advantest Corporation
- Inventors: Hiroki Kimura; Yuichi Miyaji
- Web page: https://patentgrep.com/patent/US7612590B2

## CPC

- H03L 7/085: concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal (H03L7/10 takes precedence; circuits for comparing the phase or frequency of two mutually-independent oscillations H03D13/00)
- H03L 7/0898: {the source or sink current values being variable (H03L7/0896 takes precedence)}
- H03L 7/18: using a frequency divider or counter in the loop (H03L7/20, H03L7/22 take precedence)
- H03L: AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES (generation of oscillations H03B)

## Abstract

An oscillating apparatus is provided that includes: an integration circuit that outputs a control signal based on an integration value of two inputted voltage values; an oscillator that outputs an oscillation signal of a frequency that is based on the control signal; a phase comparator that outputs a phase difference signal of a pulse width that is in accordance with a phase difference between the oscillation signal and the reference signal, by comparing the oscillation signal with a reference signal of a predetermined frequency; a controlling circuits that controls the two inputted voltage values based on the phase difference signal, so as to approximate a phase difference between the oscillation signal and the reference signal to a predetermined reference phase difference; and a voltage stabilizing current that defines the two inputted voltages based on a predetermined reference voltage.

## Claims

### Claim 1

An oscillating apparatus comprising:
an integration circuit that outputs a control signal based on an integration value of two inputted voltage values;
an oscillator that outputs an oscillation signal of a frequency that is based on the control signal;
a phase comparator that outputs a phase difference signal of a pulse width that is in accordance with a phase difference between the oscillation signal and the reference signal, by comparing the oscillation signal with a reference signal of a predetermined frequency;
a controlling circuit that controls the two inputted voltage values based on the phase difference signal, so as to approximate a phase difference between the oscillation signal and the reference signal to a predetermined reference phase difference; and
a voltage stabilizing circuit that defines the two inputted voltage values both based on a predetermined reference voltage.

### Claim 2 (depends on 1)

The oscillating apparatus as set forth in claim 1, wherein the controlling circuit generates a first voltage (VU) and a second voltage (VD), based on voltage values respectively of a first terminal (U) and a second terminal (D) of the phase comparator and further generates a predetermined phase controlling voltage (VC).

### Claim 3 (depends on 2)

The oscillating apparatus as set forth in claim 2, wherein the controlling circuit sets the phase controlling voltage (VC) and the first voltage (VD) as one inputted voltage value with respect to the integration circuit, and the second voltage (VU) as the other inputted voltage value.