There is provided a frequency-variable oscillator that varies, even when a frequency of an input signal is varied, a frequency of an oscillation signal according to the varied frequency of the input signal. The frequency-variable oscillator includes: a voltage-to-current converter circuit for converting a voltage level of an input signal into a current level within a predetermined range; and an oscillator circuit for varying a frequency according to the current level from the voltage-to-current converter circuit and oscillating the varied frequency.

Claims

4 · 1 independent · depth 3

4 granted claims

›1.independentA frequency-variable oscillator comprising:na voltage-to-current converter circuit converting a voltage level of an input signal into a current level …+3

Classifications

5 codes

IPC · International Patent Classification

Section H — Electricity

H03K3/37
H03K3/233

USPC · US Patent Classification

331/143331/186331/17

Claim changes

Soon

Coming soonHow the claims changed between publication and grant

See which claims were amended, added or cancelled during examination, with every added and removed word marked.

AmendedAddedCancelledUnchanged

The published claims of this patent are not paired with the granted ones in what we hold.

File wrapper

Pendency

2.4 y

867 days filing → grant

Office actions

non-final + final

Responses

1 RCE

Examiner

Robert Pascal

art unit 2817 · TC 2800

Law firm

Law firm · Log in to unlock

Citations: 11 back · 0 forward

See the full prosecution history — every USPTO and applicant action on this file, in order.

Term & fees

See the term timeline — pendency span, in-force span, the maintenance fees paid and both computed expiry dates.

Priority chain

1 priority documents

›Priority documents — 1

Type	Document	Date
related publication	US 20090009256 A1	8 Jan 2009

Validity challenges

See the validity challenges on record — reexaminations, IPRs and PGRs, with their institution decisions and outcomes.

Citations

See every patent this one cites and every patent that cites it back — publication, assignee, and how each one was found.