Oscillator circuit
View Patent ↗An oscillator circuit comprises a push-push oscillator and a differential output, comprising a first and a second output circuit. The push-push oscillator has a first and a second branch. Each of the first and second branch comprises an own voltage divider branch of a common bridge circuit. Each of the first and second voltage divider branches comprises an own pair of micro-strip lines connected in series. Each of the first and second voltage divider branches has an own tap. Both taps are connected to each other by at least one of a first capacity and a micro-strip line. The differential output comprises a first and a second output terminal. The first output terminal is connected via the first output circuit to a first node. The second output terminal is connected via the second output circuit to a second node. Each of the first and second nodes of the push-push oscillator is a common node of both of the first and the second branches.
1. An oscillator circuit comprising:
a push-push oscillator, wherein
the push-push oscillator has a first and a second branch,
each of the first and second branch comprises a voltage divider branch of a common bridge circuit,
each of the first and second voltage divider branches comprises a pair of micro-strip lines connected in series,
each of the first and second voltage divider branches has a tap, and
both taps are connected to each other by at least one of a first capacity and a micro-strip line;
a differential output comprising a first and a second output terminal, wherein
the first output terminal is connected to a first node and the second output terminal is connected to a second node, and
each of the first and second nodes of the push-push oscillator is a common node of both of the first and second branches; and
a first output circuit for the first output terminal and a second output circuit for the second output terminal.
2. The oscillator circuit according to claim 1 , wherein the common bridge circuit has a resonance at an output oscillation frequency, which is an integer multiple of a fundamental oscillation frequency of the oscillator.
3. The oscillator circuit according to claim 2 , wherein the output oscillation frequency is twice as high as the fundamental oscillation frequency.
4. The oscillator circuit according to claim 1 , wherein
within each of the first and second branches of the push-push oscillator a micro-strip line is arranged between a resonance circuit of the push-push oscillator and the first node, which is common to both of the first and second branches, wherein
the micro-strip line has a length of an uneven integer multiple of a quarter wave length of a fundamental oscillation frequency of the push-push oscillator.
5. The oscillator circuit according to claim 1 , wherein each of the first and the second branch of the push-push oscillator comprises exactly one transistor stage, wherein both transistor stages have an identical structure.
6. The oscillator circuit according to claim 1 , wherein the push-push oscillator is a voltage-controlled push-push oscillator.
7. The oscillator circuit according to claim 1 , wherein the push-push oscillator has at least one variable-capacitance diode.
8. The oscillator circuit according to claim 5 , wherein the gate terminals of both transistor stages are connected by a third branch, wherein the third branch comprises two micro-strip lines.
9. The oscillator circuit according to claim 8 , wherein a micro-strip line is connected to a tap of the third branch, wherein the micro-strip line is terminated by a second capacity via which the push-push oscillator can be activated and deactivated by a first control signal.
10. The oscillator circuit according to claim 1 , wherein the oscillator circuit is designed to be supplied by a voltage source.
11. The oscillator circuit according to claim 4 , wherein each of the first and the second branch of the push-push oscillator comprises exactly one transistor stage, wherein both transistor stages have an identical structure.
12. The oscillator circuit according to claim 4 , wherein the push-push oscillator is a voltage-controlled push-push oscillator.
13. The oscillator circuit according to claim 5 , wherein the push-push oscillator is a voltage-controlled push-push oscillator.
14. The oscillator circuit according to claim 4 , wherein the push-push oscillator has at least one variable-capacitance diode.
15. The oscillator circuit according to claim 5 , wherein the push-push oscillator has at least one variable-capacitance diode.
16. The oscillator circuit according to claim 13 , wherein the gate terminals of both transistor stages are connected by a third branch, wherein the third branch comprises two micro-strip lines.
17. The oscillator circuit according to claim 15 , wherein the gate terminals of both transistor stages are connected by a third branch, wherein the third branch comprises two micro-strip lines.